{"id":"https://openalex.org/A5113978834","orcid":null,"observed_orcids":[],"display_name":"Hansjoerg Ullerich","raw_author_names":["Hans-Joerg Ullerich","Hansjoerg Ullerich","Ullerich Hansjoerg"],"full_name":"Hansjoerg Ullerich","works_count":37,"cited_by_count":741,"summary_stats":{"2yr_mean_citedness":6.0,"h_index":14,"i10_index":18},"ids":{"openalex":"https://openalex.org/A5113978834","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I1281400175","ror":"https://ror.org/00j9c2840","display_name":"Oslo University Hospital","country_code":"NO","type":"healthcare","lineage":["https://openalex.org/I1281400175"]},"years":[2010]},{"institution":{"id":"https://openalex.org/I22465464","ror":"https://ror.org/00pd74e08","display_name":"University of M\u00fcnster","country_code":"DE","type":"education","lineage":["https://openalex.org/I22465464"]},"years":[2017,2016,2015,2014,2013,2012,2011,2010,2009,2008]},{"institution":{"id":"https://openalex.org/I25041050","ror":"https://ror.org/012mef835","display_name":"Augusta University","country_code":"US","type":"education","lineage":["https://openalex.org/I25041050"]},"years":[2010]},{"institution":{"id":"https://openalex.org/I2801952686","ror":"https://ror.org/018906e22","display_name":"Erasmus MC","country_code":"NL","type":"healthcare","lineage":["https://openalex.org/I2801952686"]},"years":[2010]},{"institution":{"id":"https://openalex.org/I4210093329","ror":"https://ror.org/00mre2126","display_name":"Toho University Ohashi Medical Center","country_code":"JP","type":"healthcare","lineage":["https://openalex.org/I4210093329"]},"years":[2010]},{"institution":{"id":"https://openalex.org/I4210103666","ror":"https://ror.org/01856cw59","display_name":"University Hospital M\u00fcnster","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I4210103666"]},"years":[2024,2023,2022,2020,2019,2018,2013,2009]}],"last_known_institutions":[{"id":"https://openalex.org/I4210103666","ror":"https://ror.org/01856cw59","display_name":"University Hospital M\u00fcnster","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I4210103666"]}],"topics":[{"id":"https://openalex.org/T10518","display_name":"Gallbladder and Bile Duct Disorders","count":17,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/T12460","display_name":"Pediatric Hepatobiliary Diseases and Treatments","count":11,"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/T12053","display_name":"Minimally Invasive Surgical Techniques","count":8,"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/T11855","display_name":"Gastrointestinal disorders and treatments","count":6,"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/T11378","display_name":"Gastrointestinal Bleeding Diagnosis and Treatment","count":5,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/T12460","display_name":"Pediatric Hepatobiliary Diseases and Treatments","value":5.46e-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/T13569","display_name":"Microscopic Colitis","value":4.34e-05,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/T12438","display_name":"Urticaria and Related Conditions","value":4.06e-05,"subfield":{"id":"https://openalex.org/subfields/2708","display_name":"Dermatology"},"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/T10518","display_name":"Gallbladder and Bile Duct Disorders","value":3.97e-05,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/T12053","display_name":"Minimally Invasive Surgical Techniques","value":3.2e-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":0.9680852890014648},{"id":"126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","score":0.655333399772644},{"id":"126838900","wikidata":"https://www.wikidata.org/wiki/Q77604","display_name":"Radiology","score":0.6433690786361694},{"id":"2778451229","wikidata":"https://www.wikidata.org/wiki/Q212809","display_name":"Endoscopy","score":0.6137799620628357},{"id":"141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","score":0.5271622538566589}],"counts_by_year":[{"year":2008,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":3,"oa_works_count":0,"cited_by_count":17},{"year":2013,"works_count":3,"oa_works_count":0,"cited_by_count":25},{"year":2014,"works_count":2,"oa_works_count":0,"cited_by_count":26},{"year":2015,"works_count":1,"oa_works_count":1,"cited_by_count":42},{"year":2016,"works_count":1,"oa_works_count":0,"cited_by_count":38},{"year":2017,"works_count":3,"oa_works_count":0,"cited_by_count":29},{"year":2018,"works_count":4,"oa_works_count":3,"cited_by_count":34},{"year":2019,"works_count":4,"oa_works_count":2,"cited_by_count":51},{"year":2020,"works_count":1,"oa_works_count":1,"cited_by_count":66},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":73},{"year":2022,"works_count":2,"oa_works_count":1,"cited_by_count":77},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":59},{"year":2024,"works_count":1,"oa_works_count":1,"cited_by_count":53},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":67},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":44}],"display_name_alternatives":["Hans-Joerg Ullerich","Hansjoerg Ullerich","Ullerich Hansjoerg"],"block_key":"h ullerich","works_api_url":"https://api.openalex.org/works?filter=author.id:A5113978834","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5113978834","updated_date":"2026-11-12T13:17:38","created_date":"2016-06-24T00:00:00"}
