{"id":"https://openalex.org/A5085736473","orcid":"https://orcid.org/0000-0002-2752-2349","observed_orcids":["https://orcid.org/0000-0002-2752-2349"],"display_name":"Muhammad Ancha Sitorus","raw_author_names":["Ancha Sitorus","M. Ancha Sitorus","Muhammad Ancha Sitorus"],"full_name":"Muhammad Walimsyah Sitorus","works_count":25,"cited_by_count":110,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":7,"i10_index":3},"ids":{"openalex":"https://openalex.org/A5085736473","orcid":"https://orcid.org/0000-0002-2752-2349","observed_orcids":["https://orcid.org/0000-0002-2752-2349"]},"affiliations":[{"institution":{"id":"https://openalex.org/I203089679","ror":"https://ror.org/022gvg072","display_name":"State University of Medan","country_code":"ID","type":"education","lineage":["https://openalex.org/I203089679"]},"years":[2019]},{"institution":{"id":"https://openalex.org/I4210137904","ror":"https://ror.org/03z1wm043","display_name":"Universitas Islam Negeri Sumatera Utara","country_code":"ID","type":"education","lineage":["https://openalex.org/I4210137904"]},"years":[2023]},{"institution":{"id":"https://openalex.org/I4405253420","ror":"https://ror.org/00n4cf238","display_name":"Institut Kesehatan Helvetia","country_code":"ID","type":"education","lineage":["https://openalex.org/I4405253420"]},"years":[2019]},{"institution":{"id":"https://openalex.org/I4405263318","ror":"https://ror.org/056zmrb94","display_name":"Ministry of Population and Family Planning","country_code":"ID","type":"facility","lineage":["https://openalex.org/I4405263318"]},"years":[2025,2023,2022,2021,2020,2019,2018]}],"last_known_institutions":[{"id":"https://openalex.org/I4405263318","ror":"https://ror.org/056zmrb94","display_name":"Ministry of Population and Family Planning","country_code":"ID","type":"facility","lineage":["https://openalex.org/I4405263318"]}],"topics":[{"id":"https://openalex.org/T10600","display_name":"Reproductive Health and Contraception","count":14,"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"}},{"id":"https://openalex.org/T12728","display_name":"Demographic Trends and Gender Preferences","count":8,"subfield":{"id":"https://openalex.org/subfields/3318","display_name":"Gender Studies"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T13242","display_name":"Male Reproductive Health Studies","count":7,"subfield":{"id":"https://openalex.org/subfields/2748","display_name":"Urology"},"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/T14495","display_name":"Public Health and Nutrition","count":6,"subfield":{"id":"https://openalex.org/subfields/2735","display_name":"Pediatrics, Perinatology and Child Health"},"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/T10209","display_name":"Global Maternal and Child Health","count":4,"subfield":{"id":"https://openalex.org/subfields/2735","display_name":"Pediatrics, Perinatology and Child Health"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12728","display_name":"Demographic Trends and Gender Preferences","value":9.14e-05,"subfield":{"id":"https://openalex.org/subfields/3318","display_name":"Gender Studies"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T13242","display_name":"Male Reproductive Health Studies","value":6.88e-05,"subfield":{"id":"https://openalex.org/subfields/2748","display_name":"Urology"},"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/T10600","display_name":"Reproductive Health and Contraception","value":3.12e-05,"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"}},{"id":"https://openalex.org/T11987","display_name":"COVID-19 Impact on Reproduction","value":3.05e-05,"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/T13805","display_name":"Adolescent Health and Behaviors","value":2.69e-05,"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"}}],"x_concepts":[{"id":"2779076696","wikidata":"https://www.wikidata.org/wiki/Q1280670","display_name":"Family planning","score":0.8991314172744751},{"id":"71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","score":0.8015999794006348},{"id":"2908647359","wikidata":"https://www.wikidata.org/wiki/Q2625603","display_name":"Population","score":0.6157243847846985},{"id":"149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","score":0.6106738448143005},{"id":"144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","score":0.44635307788848877}],"counts_by_year":[{"year":2017,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2018,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2019,"works_count":6,"oa_works_count":5,"cited_by_count":0},{"year":2020,"works_count":3,"oa_works_count":3,"cited_by_count":3},{"year":2021,"works_count":6,"oa_works_count":5,"cited_by_count":11},{"year":2022,"works_count":4,"oa_works_count":4,"cited_by_count":21},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":20},{"year":2024,"works_count":1,"oa_works_count":1,"cited_by_count":28},{"year":2025,"works_count":1,"oa_works_count":1,"cited_by_count":16},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":11}],"display_name_alternatives":["Ancha Sitorus","M. Ancha Sitorus","Muhammad Ancha Sitorus"],"block_key":"m sitorus","works_api_url":"https://api.openalex.org/works?filter=author.id:A5085736473","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5085736473","updated_date":"2026-11-10T14:30:39","created_date":"2019-04-01T00:00:00"}