{"id":"https://openalex.org/A5009422158","orcid":"https://orcid.org/0000-0001-8204-9294","observed_orcids":["https://orcid.org/0000-0001-8204-9294"],"display_name":"Stephen Cha","raw_author_names":["S.S. Cha","Stephen Cha"],"full_name":"Stephen Cha","works_count":48,"cited_by_count":2558,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":20,"i10_index":28},"ids":{"openalex":"https://openalex.org/A5009422158","orcid":"https://orcid.org/0000-0001-8204-9294","observed_orcids":["https://orcid.org/0000-0001-8204-9294"]},"affiliations":[{"institution":{"id":"https://openalex.org/I1330342723","ror":"https://ror.org/02qp3tb03","display_name":"Mayo Clinic","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1330342723"]},"years":[2020,2019,2018,2017,2016,2015,2014,2013,2012,2011,2010,2006,2005,2003,1997,1996]},{"institution":{"id":"https://openalex.org/I4210125099","ror":"https://ror.org/03jp40720","display_name":"Mayo Clinic in Arizona","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1330342723","https://openalex.org/I4210125099"]},"years":[2020,2018,2017]},{"institution":{"id":"https://openalex.org/I4210127938","ror":"https://ror.org/03660jn93","display_name":"Mayo Clinic Hospital","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1330342723","https://openalex.org/I4210125099","https://openalex.org/I4210127938"]},"years":[2020,2017,2016]},{"institution":{"id":"https://openalex.org/I50959184","ror":"https://ror.org/02g02rq35","display_name":"Centers for Medicare and Medicaid Services","country_code":"US","type":"government","lineage":["https://openalex.org/I1299022934","https://openalex.org/I50959184"]},"years":[2016,2015]}],"last_known_institutions":[{"id":"https://openalex.org/I1330342723","ror":"https://ror.org/02qp3tb03","display_name":"Mayo Clinic","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1330342723"]},{"id":"https://openalex.org/I4210125099","ror":"https://ror.org/03jp40720","display_name":"Mayo Clinic in Arizona","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1330342723","https://openalex.org/I4210125099"]},{"id":"https://openalex.org/I4210127938","ror":"https://ror.org/03660jn93","display_name":"Mayo Clinic Hospital","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I1330342723","https://openalex.org/I4210125099","https://openalex.org/I4210127938"]}],"topics":[{"id":"https://openalex.org/T10983","display_name":"Aortic aneurysm repair treatments","count":23,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"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/T10618","display_name":"Aortic Disease and Treatment Approaches","count":21,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"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/T12453","display_name":"Infectious Aortic and Vascular Conditions","count":13,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"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/T10926","display_name":"Peripheral Artery Disease Management","count":5,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"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/T11554","display_name":"Vascular Procedures and Complications","count":5,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"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/T12453","display_name":"Infectious Aortic and Vascular Conditions","value":0.000169,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"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/T10983","display_name":"Aortic aneurysm repair treatments","value":0.0001257,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"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/T10618","display_name":"Aortic Disease and Treatment Approaches","value":7.2e-05,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"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/T13110","display_name":"Colorectal and Anal Carcinomas","value":4.87e-05,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"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/T12476","display_name":"Intraoperative Neuromonitoring and Anesthetic Effects","value":2.85e-05,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"x_concepts":[{"id":"71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","score":0.9910299777984619},{"id":"141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","score":0.7746028900146484},{"id":"126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","score":0.648932933807373},{"id":"126838900","wikidata":"https://www.wikidata.org/wiki/Q77604","display_name":"Radiology","score":0.5970146656036377},{"id":"2776098176","wikidata":"https://www.wikidata.org/wiki/Q189389","display_name":"Aneurysm","score":0.5147164463996887}],"counts_by_year":[{"year":1996,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2005,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2010,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2011,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":3,"oa_works_count":3,"cited_by_count":59},{"year":2013,"works_count":2,"oa_works_count":2,"cited_by_count":80},{"year":2014,"works_count":4,"oa_works_count":3,"cited_by_count":88},{"year":2015,"works_count":5,"oa_works_count":3,"cited_by_count":101},{"year":2016,"works_count":5,"oa_works_count":4,"cited_by_count":104},{"year":2017,"works_count":5,"oa_works_count":4,"cited_by_count":125},{"year":2018,"works_count":5,"oa_works_count":3,"cited_by_count":146},{"year":2019,"works_count":3,"oa_works_count":2,"cited_by_count":197},{"year":2020,"works_count":3,"oa_works_count":1,"cited_by_count":240},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":171},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":178},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":156},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":178},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":134},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":99}],"display_name_alternatives":["S.S. Cha","Stephen Cha"],"block_key":"s cha","works_api_url":"https://api.openalex.org/works?filter=author.id:A5009422158","updated_date":"2026-10-31T12:29:50","created_date":"2016-06-24T00:00:00"}