{"id":"https://openalex.org/W4243266397","doi":"https://doi.org/10.1097/01.ogx.0000286565.37514.92","title":"Magnesium Sulfate Compared with Nifedipine for Acute Tocolysis of Preterm Labor: A Randomized Controlled Trial","display_name":"Magnesium Sulfate Compared with Nifedipine for Acute Tocolysis of Preterm Labor: A Randomized Controlled Trial","publication_year":2007,"publication_date":"2007-11-01","ids":{"openalex":"https://openalex.org/W4243266397","doi":"https://doi.org/10.1097/01.ogx.0000286565.37514.92"},"language":"en","primary_location":{"id":"doi:10.1097/01.ogx.0000286565.37514.92","doi":"https://doi.org/10.1097/01.ogx.0000286565.37514.92","is_oa":false,"landing_page_url":"https://doi.org/10.1097/01.ogx.0000286565.37514.92","pdf_url":null,"source":{"id":"https://openalex.org/S115789314","display_name":"Obstetrical & Gynecological Survey","issn_l":"0029-7828","issn":["0029-7828","1533-9866"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","doyens","jufo-1","ki-jl-1","medline","norway-1","poland-70","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310315671","host_organization_name":"Lippincott Williams & Wilkins","host_organization_lineage":["https://openalex.org/P4310315671","https://openalex.org/P4310318547"],"host_organization_lineage_names":["Lippincott Williams & Wilkins","Wolters Kluwer"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Obstetrical &amp; Gynecological Survey","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5047058462","display_name":"Deirdre J. Lyell","orcid":"https://orcid.org/0000-0002-6853-9956","observed_orcids":["https://orcid.org/0000-0002-6853-9956"]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Deirdre J. Lyell","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5048262070","display_name":"Kristen Pullen","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Kristen Pullen","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5030267390","display_name":"Laura Chappell-Campbell","orcid":"https://orcid.org/0000-0001-7300-9602","observed_orcids":["https://orcid.org/0000-0001-7300-9602"]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Laura Campbell","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004849170","display_name":"Suzanne Ching","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Suzanne Ching","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018824137","display_name":"Maurice L. Druzin","orcid":"https://orcid.org/0000-0001-7185-6664","observed_orcids":["https://orcid.org/0000-0001-7185-6664"]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Maurice L. Druzin","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060183185","display_name":"Usha Chitkara","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Usha Chitkara","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5024513647","display_name":"Demetra Burrs","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Demetra Burrs","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109063330","display_name":"Aaron Brandon Caughey","orcid":"https://orcid.org/0000-0002-1752-0972","observed_orcids":["https://orcid.org/0000-0002-1752-0972"]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Aaron B. Caughey","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5108398722","display_name":"Yasser Yehia El-Sayed","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1317822957","display_name":"Palo Alto Medical Foundation","ror":"https://ror.org/04rg6e566","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I114073160","https://openalex.org/I1317822957"]},{"id":"https://openalex.org/I1334016132","display_name":"Lucile Packard Children's Hospital","ror":"https://ror.org/05a25vm86","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I180670191","display_name":"University of California, San Francisco","ror":"https://ror.org/043mz5j54","country_code":"US","type":"education","lineage":["https://openalex.org/I180670191"]},{"id":"https://openalex.org/I2801022843","display_name":"Santa Clara Valley Medical Center","ror":"https://ror.org/02v7qv571","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I2801022843","https://openalex.org/I4210115301"]},{"id":"https://openalex.org/I4210137306","display_name":"Stanford Medicine","ror":"https://ror.org/03mtd9a03","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"id":"https://openalex.org/I97018004","display_name":"Stanford University","ror":"https://ror.org/00f54p054","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Yasser Y. El-Sayed","raw_affiliation_strings":["Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","Palo Alto Medical Foundation, Fremont, California","Santa Clara Valley Medical Center, Santa Clara, California","and University of California San Francisco, San Francisco, California","110:61\u201367","Obstet Gynecol 2007","University of California San Francisco, San Francisco, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology, Stanford University Medical Center, Lucile S. Packard Children's Hospital, Stanford, California","institution_ids":["https://openalex.org/I1334016132","https://openalex.org/I4210137306","https://openalex.org/I97018004"]},{"raw_affiliation_string":"Palo Alto Medical Foundation, Fremont, California","institution_ids":["https://openalex.org/I1317822957"]},{"raw_affiliation_string":"Santa Clara Valley Medical Center, Santa Clara, California","institution_ids":["https://openalex.org/I2801022843"]},{"raw_affiliation_string":"and University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]},{"raw_affiliation_string":"110:61\u201367","institution_ids":[]},{"raw_affiliation_string":"Obstet Gynecol 2007","institution_ids":[]},{"raw_affiliation_string":"University of California San Francisco, San Francisco, California","institution_ids":["https://openalex.org/I180670191"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":6,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":10,"citation_normalized_percentile":{"value":0.52111092,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"62","issue":"11","first_page":"696","last_page":"697"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11290","display_name":"Preterm Birth and Chorioamnionitis","score":0.9965999722480774,"subfield":{"id":"https://openalex.org/subfields/2713","display_name":"Epidemiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T11290","display_name":"Preterm Birth and Chorioamnionitis","score":0.9965999722480774,"subfield":{"id":"https://openalex.org/subfields/2713","display_name":"Epidemiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T10453","display_name":"Maternal and Perinatal Health Interventions","score":0.0008999999845400453,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11964","display_name":"Pregnancy and Medication Impact","score":0.000699999975040555,"subfield":{"id":"https://openalex.org/subfields/2739","display_name":"Public Health, Environmental and Occupational Health"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/magnesium-sulfate","display_name":"magnesium sulfate","score":0.9829999804496765},{"id":"https://openalex.org/keywords/nifedipine","display_name":"nifedipine","score":0.9980000257492065},{"id":"https://openalex.org/keywords/tocolysis","display_name":"tocolysis","score":0.9330000281333923},{"id":"https://openalex.org/keywords/preterm-labor","display_name":"preterm labor","score":0.9929999709129333},{"id":"https://openalex.org/keywords/uterine-quiescence","display_name":"uterine quiescence","score":0.8999999761581421},{"id":"https://openalex.org/keywords/maternal-side-effects","display_name":"maternal side effects","score":0.6039999723434448},{"id":"https://openalex.org/keywords/pulmonary-edema","display_name":"pulmonary edema","score":0.8809999823570251},{"id":"https://openalex.org/keywords/neonatal-intensive-care-unit-admission","display_name":"neonatal intensive care admission","score":0.9190000295639038},{"id":"https://openalex.org/keywords/neonatal-outcomes","display_name":"neonatal outcomes","score":0.7630000114440918}],"concepts":[{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.9484769701957703},{"id":"https://openalex.org/C2779066535","wikidata":"https://www.wikidata.org/wiki/Q39111","display_name":"Nifedipine","level":3,"score":0.9022159576416016},{"id":"https://openalex.org/C2908881489","wikidata":"https://www.wikidata.org/wiki/Q545234","display_name":"Tocolytic agent","level":5,"score":0.8129380941390991},{"id":"https://openalex.org/C2780931799","wikidata":"https://www.wikidata.org/wiki/Q545234","display_name":"Tocolytic","level":5,"score":0.7348939180374146},{"id":"https://openalex.org/C197934379","wikidata":"https://www.wikidata.org/wiki/Q2047938","display_name":"Adverse effect","level":2,"score":0.6757016777992249},{"id":"https://openalex.org/C42219234","wikidata":"https://www.wikidata.org/wiki/Q131130","display_name":"Anesthesia","level":1,"score":0.6446953415870667},{"id":"https://openalex.org/C46973012","wikidata":"https://www.wikidata.org/wiki/Q28627","display_name":"Gestation","level":3,"score":0.5849793553352356},{"id":"https://openalex.org/C2778376644","wikidata":"https://www.wikidata.org/wiki/Q2253111","display_name":"Gestational age","level":3,"score":0.5832112431526184},{"id":"https://openalex.org/C168563851","wikidata":"https://www.wikidata.org/wiki/Q1436668","display_name":"Randomized controlled trial","level":2,"score":0.5709799528121948},{"id":"https://openalex.org/C543218039","wikidata":"https://www.wikidata.org/wiki/Q660","display_name":"Magnesium","level":2,"score":0.43193936347961426},{"id":"https://openalex.org/C131872663","wikidata":"https://www.wikidata.org/wiki/Q5284418","display_name":"Obstetrics","level":1,"score":0.40752658247947693},{"id":"https://openalex.org/C2779234561","wikidata":"https://www.wikidata.org/wiki/Q11995","display_name":"Pregnancy","level":2,"score":0.39572831988334656},{"id":"https://openalex.org/C3019152611","wikidata":"https://www.wikidata.org/wiki/Q625506","display_name":"Preterm labor","level":4,"score":0.33699020743370056},{"id":"https://openalex.org/C141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","level":1,"score":0.2077995240688324},{"id":"https://openalex.org/C519063684","wikidata":"https://www.wikidata.org/wiki/Q706","display_name":"Calcium","level":2,"score":0.18302270770072937},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.1752772033214569},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.0},{"id":"https://openalex.org/C191897082","wikidata":"https://www.wikidata.org/wiki/Q11467","display_name":"Metallurgy","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1097/01.ogx.0000286565.37514.92","doi":"https://doi.org/10.1097/01.ogx.0000286565.37514.92","is_oa":false,"landing_page_url":"https://doi.org/10.1097/01.ogx.0000286565.37514.92","pdf_url":null,"source":{"id":"https://openalex.org/S115789314","display_name":"Obstetrical & Gynecological Survey","issn_l":"0029-7828","issn":["0029-7828","1533-9866"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","doyens","jufo-1","ki-jl-1","medline","norway-1","poland-70","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310315671","host_organization_name":"Lippincott Williams & Wilkins","host_organization_lineage":["https://openalex.org/P4310315671","https://openalex.org/P4310318547"],"host_organization_lineage_names":["Lippincott Williams & Wilkins","Wolters Kluwer"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Obstetrical &amp; Gynecological Survey","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","display_name":"Good health and well-being","score":1.0}],"study_designs":[{"id":"https://openalex.org/study-designs/clinical-trial","display_name":"Clinical Trial"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2012228801","https://openalex.org/W6912088766","https://openalex.org/W7217113464","https://openalex.org/W1715623587","https://openalex.org/W4414196684","https://openalex.org/W4381245486","https://openalex.org/W2020067833","https://openalex.org/W2412076375","https://openalex.org/W7131107104","https://openalex.org/W3014884625"],"abstract_inverted_index":{"Although":[0],"not":[1,230],"proved":[2],"to":[3,83,94,119,235,288,295,298],"be":[4,296],"effective,":[5],"intravenous":[6],"magnesium":[7,100,190,289],"sulfate":[8,290],"is":[9,35],"the":[10,28,136,175,186,192,206,225,239],"most":[11],"frequently":[12],"used":[13],"first-line":[14],"tocolytic":[15],"agent":[16],"in":[17,76,216,224,262],"North":[18],"America.":[19],"Its":[20],"overuse":[21],"may":[22],"have":[23,51],"adverse":[24,41],"effects":[25,58,257],"on":[26],"both":[27],"mother":[29],"and":[30,48,62,109,153,166,180,191],"newborn":[31],"infant.":[32],"Nifedipine,":[33],"which":[34],"given":[36,189,203],"orally,":[37],"has":[38],"comparatively":[39],"few":[40],"effects,":[42],"although":[43],"severe":[44],"dyspnea,":[45],"myocardial":[46],"infarction,":[47],"fetal":[49],"death":[50],"been":[52],"reported.":[53],"Nifedipine":[54],"causes":[55],"fewer":[56,159],"side":[57,256],"than":[59,201],"betamimetic":[60],"agents":[61],"yields":[63],"better":[64],"neonatal":[65,299],"outcomes.":[66],"This":[67],"multicenter":[68],"randomized":[69],"trial":[70],"enrolled":[71],"192":[72],"women":[73,215],"who":[74],"presented":[75],"active":[77],"preterm":[78,253],"labor":[79],"at":[80,114,128,238],"24":[81],"weeks\u2019":[82,249],"33":[84],"weeks":[85],"+":[86],"6":[87,142,157],"days\u2019":[88],"gestation.":[89],"They":[90],"were":[91,183,258,273,291],"randomly":[92],"assigned":[93],"receive":[95],"either":[96],"4":[97,120,140],"g":[98],"of":[99,106,125,174,177,214,241,266],"sulfate,":[101],"followed":[102,134],"by":[103,135],"an":[104,115],"infusion":[105,116],"2":[107,226],"g/h":[108],"added":[110],"boluses":[111],"as":[112,156],"needed":[113],"rate":[117],"up":[118],"g/h;":[121],"or":[122,141,158,246,251],"10":[123],"mg":[124],"nifedipine":[126,204],"sublingually":[127],"20-minute":[129],"intervals":[130],"totaling":[131],"3":[132,265,292],"doses,":[133],"same":[137],"dose":[138],"every":[139],"hours.":[143,222],"The":[144],"primary":[145,207],"outcome":[146,208],"was":[147],"no":[148,167],"delivery":[149],"for":[150,163,185,279],"48":[151,172,221],"hours":[152,165,173],"uterine":[154],"quiescence\u2014defined":[155],"contractions":[160],"per":[161],"hour":[162],"12":[164],"further":[168],"cervical":[169],"change":[170],"within":[171,220],"start":[176],"treatment.":[178],"Demographics":[179],"obstetrical":[181],"characteristics":[182],"similar":[184],"92":[187],"patients":[188,200],"100":[193],"treated":[194],"with":[195,233],"nifedipine.":[196],"Significantly":[197],"more":[198,260],"magnesium-treated":[199,263],"those":[202],"achieved":[205],"(87%":[209],"vs.":[210],"72%).":[211],"Approximately":[212],"8%":[213],"each":[217],"group":[218],"delivered":[219],"Patients":[223],"treatment":[227],"groups":[228],"did":[229],"differ":[231],"significantly":[232,259],"regard":[234],"gestational":[236],"age":[237],"time":[240],"delivery,":[242],"birth":[243],"before":[244,247],"37":[245],"32":[248],"gestation,":[250],"recurrent":[252],"labor.":[254],"Maternal":[255],"frequent":[261],"women,":[264],"whom":[267],"had":[268],"pulmonary":[269],"edema.":[270],"Neonatal":[271],"outcomes":[272],"similar,":[274],"but":[275],"multivariable":[276],"analysis,":[277],"controlling":[278],"numerous":[280],"possible":[281],"confounding":[282],"factors,":[283],"showed":[284],"that":[285],"infants":[286],"exposed":[287],"times":[293],"likelier":[294],"admitted":[297],"intensive":[300],"care.":[301]},"counts_by_year":[{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-10-17T09:40:24.721904","created_date":"2022-05-12T00:00:00"}
