{"id":"https://openalex.org/A5111777573","orcid":null,"observed_orcids":[],"display_name":"Matthias Kemen","raw_author_names":["M. Kemen","Matthias Kemen"],"full_name":"Matthias Kemen","works_count":19,"cited_by_count":933,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":10,"i10_index":10},"ids":{"openalex":"https://openalex.org/A5111777573","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I200763008","ror":"https://ror.org/033eqas34","display_name":"Justus-Liebig-Universit\u00e4t Gie\u00dfen","country_code":"DE","type":"education","lineage":["https://openalex.org/I200763008"]},"years":[1997]},{"institution":{"id":"https://openalex.org/I2799391451","ror":"https://ror.org/01xnwqx93","display_name":"University Hospital Bonn","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2799391451"]},"years":[1997]},{"institution":{"id":"https://openalex.org/I2799784675","ror":"https://ror.org/03zcpvf19","display_name":"University Hospitals of the Ruhr-University of Bochum","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2799784675"]},"years":[2023]},{"institution":{"id":"https://openalex.org/I4210088550","ror":"https://ror.org/004h6mc53","display_name":"Universit\u00e4tsklinik Marien Hospital Herne","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2799784675","https://openalex.org/I4210088550"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I4210103542","ror":"https://ror.org/013z6ae41","display_name":"German Cancer Society","country_code":"DE","type":"nonprofit","lineage":["https://openalex.org/I4210103542"]},"years":[2016]},{"institution":{"id":"https://openalex.org/I4210138993","ror":"https://ror.org/046vare28","display_name":"St. Josef-Hospital","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2799784675","https://openalex.org/I4210138993","https://openalex.org/I4210153564"]},"years":[2000,1999,1998,1997,1996,1995]},{"institution":{"id":"https://openalex.org/I62318514","ror":"https://ror.org/04mz5ra38","display_name":"University of Duisburg-Essen","country_code":"DE","type":"education","lineage":["https://openalex.org/I62318514"]},"years":[2014]},{"institution":{"id":"https://openalex.org/I8204097","ror":"https://ror.org/05591te55","display_name":"Ludwig-Maximilians-Universit\u00e4t M\u00fcnchen","country_code":"DE","type":"education","lineage":["https://openalex.org/I8204097"]},"years":[2007]},{"institution":{"id":"https://openalex.org/I904495901","ror":"https://ror.org/04tsk2644","display_name":"Ruhr University Bochum","country_code":"DE","type":"education","lineage":["https://openalex.org/I904495901"]},"years":[2023,2000,1999,1998,1997,1996,1995]}],"last_known_institutions":[{"id":"https://openalex.org/I2799784675","ror":"https://ror.org/03zcpvf19","display_name":"University Hospitals of the Ruhr-University of Bochum","country_code":"DE","type":"healthcare","lineage":["https://openalex.org/I2799784675"]},{"id":"https://openalex.org/I904495901","ror":"https://ror.org/04tsk2644","display_name":"Ruhr University Bochum","country_code":"DE","type":"education","lineage":["https://openalex.org/I904495901"]}],"topics":[{"id":"https://openalex.org/T10858","display_name":"Clinical Nutrition and Gastroenterology","count":5,"subfield":{"id":"https://openalex.org/subfields/2916","display_name":"Nutrition and Dietetics"},"field":{"id":"https://openalex.org/fields/29","display_name":"Nursing"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12020","display_name":"Enhanced Recovery After Surgery","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/T10926","display_name":"Peripheral Artery Disease Management","count":4,"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","count":3,"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":3,"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"}}],"topic_share":[{"id":"https://openalex.org/T12020","display_name":"Enhanced Recovery After Surgery","value":2.91e-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/T10926","display_name":"Peripheral Artery Disease Management","value":1.89e-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/T10983","display_name":"Aortic aneurysm repair treatments","value":1.7e-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/T11623","display_name":"Hyperglycemia and glycemic control in critically ill and hospitalized patients","value":1.62e-05,"subfield":{"id":"https://openalex.org/subfields/2712","display_name":"Endocrinology, Diabetes and Metabolism"},"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/T10858","display_name":"Clinical Nutrition and Gastroenterology","value":1.58e-05,"subfield":{"id":"https://openalex.org/subfields/2916","display_name":"Nutrition and Dietetics"},"field":{"id":"https://openalex.org/fields/29","display_name":"Nursing"},"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":0.987769603729248},{"id":"141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","score":0.8474948406219482},{"id":"126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","score":0.48043394088745117},{"id":"90924648","wikidata":"https://www.wikidata.org/wiki/Q120569","display_name":"Gastroenterology","score":0.46715062856674194},{"id":"142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","score":0.45348188281059265}],"counts_by_year":[{"year":1995,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1996,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1999,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2000,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":36},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":25},{"year":2014,"works_count":1,"oa_works_count":0,"cited_by_count":26},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":24},{"year":2016,"works_count":1,"oa_works_count":0,"cited_by_count":22},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":28},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":31},{"year":2019,"works_count":3,"oa_works_count":0,"cited_by_count":26},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":32},{"year":2021,"works_count":2,"oa_works_count":1,"cited_by_count":29},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":18},{"year":2023,"works_count":1,"oa_works_count":0,"cited_by_count":32},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":35},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":40},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":18}],"display_name_alternatives":["M. Kemen","Matthias Kemen"],"block_key":"m kemen","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111777573","updated_date":"2026-11-04T11:47:51","created_date":"2016-06-24T00:00:00"}