{"id":"https://openalex.org/A5110144087","orcid":null,"observed_orcids":[],"display_name":"P. K. Opstad","raw_author_names":["Opstad P.","P K Opstad","P K. Opstad","P Opstad","P. K. OPSTAD","P. K. Opstad","P. OPSTAD","P. Opstad","P.-K. OPSTAD","P.K. Opstad","P.\u2010K. Opstad","PerK. Opstad","Perk K. Opstad"],"full_name":"Perk K. Opstad","works_count":60,"cited_by_count":1559,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":20,"i10_index":38},"ids":{"openalex":"https://openalex.org/A5110144087","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I124055696","ror":"https://ror.org/035b05819","display_name":"University of Copenhagen","country_code":"DK","type":"education","lineage":["https://openalex.org/I124055696"]},"years":[1993]},{"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":[2003,1993,1989]},{"institution":{"id":"https://openalex.org/I163244428","ror":"https://ror.org/0098gnz32","display_name":"Norwegian Defence Research Establishment","country_code":"NO","type":"facility","lineage":["https://openalex.org/I163244428"]},"years":[2013,2011,2010,2009,2008,2007,2005,2003,2002,2001,2000,1998,1997,1996,1995,1994,1993,1992,1991,1990,1989,1988,1987,1986,1985,1984,1983,1982,1981,1980,1978]},{"institution":{"id":"https://openalex.org/I184942183","ror":"https://ror.org/01xtthb56","display_name":"University of Oslo","country_code":"NO","type":"education","lineage":["https://openalex.org/I184942183"]},"years":[1987]},{"institution":{"id":"https://openalex.org/I2801941904","ror":"https://ror.org/00td68a17","display_name":"Bispebjerg Hospital","country_code":"DK","type":"healthcare","lineage":["https://openalex.org/I2801941904","https://openalex.org/I2802567020"]},"years":[1984,1983]},{"institution":{"id":"https://openalex.org/I4210117451","ror":"https://ror.org/02jvh3a15","display_name":"Diakonhjemmet Hospital","country_code":"NO","type":"healthcare","lineage":["https://openalex.org/I4210117451"]},"years":[1984]},{"institution":{"id":"https://openalex.org/I4210141471","ror":"https://ror.org/03ym7ve89","display_name":"Lovisenberg Diakonale Sykehus","country_code":"NO","type":"healthcare","lineage":["https://openalex.org/I4210141471"]},"years":[1989,1984]}],"last_known_institutions":[{"id":"https://openalex.org/I163244428","ror":"https://ror.org/0098gnz32","display_name":"Norwegian Defence Research Establishment","country_code":"NO","type":"facility","lineage":["https://openalex.org/I163244428"]}],"topics":[{"id":"https://openalex.org/T11585","display_name":"Exercise and Physiological Responses","count":15,"subfield":{"id":"https://openalex.org/subfields/2737","display_name":"Physiology (medical)"},"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/T10814","display_name":"Neuropeptides and Animal Physiology","count":14,"subfield":{"id":"https://openalex.org/subfields/2804","display_name":"Cellular and Molecular Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10529","display_name":"Stress Responses and Cortisol","count":11,"subfield":{"id":"https://openalex.org/subfields/2802","display_name":"Behavioral Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10365","display_name":"Gastrointestinal motility and disorders","count":9,"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/T11209","display_name":"Cardiovascular and exercise physiology","count":9,"subfield":{"id":"https://openalex.org/subfields/2737","display_name":"Physiology (medical)"},"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/T11585","display_name":"Exercise and Physiological Responses","value":9.31e-05,"subfield":{"id":"https://openalex.org/subfields/2737","display_name":"Physiology (medical)"},"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/T10529","display_name":"Stress Responses and Cortisol","value":4.47e-05,"subfield":{"id":"https://openalex.org/subfields/2802","display_name":"Behavioral Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10814","display_name":"Neuropeptides and Animal Physiology","value":4.1e-05,"subfield":{"id":"https://openalex.org/subfields/2804","display_name":"Cellular and Molecular Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10489","display_name":"Regulation of Appetite and Obesity","value":4e-05,"subfield":{"id":"https://openalex.org/subfields/2807","display_name":"Endocrine and Autonomic Systems"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11597","display_name":"Neutrophil, Myeloperoxidase and Oxidative Mechanisms","value":3.87e-05,"subfield":{"id":"https://openalex.org/subfields/2403","display_name":"Immunology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"x_concepts":[{"id":"71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","score":0.9794464111328125},{"id":"126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","score":0.9044193029403687},{"id":"134018914","wikidata":"https://www.wikidata.org/wiki/Q162606","display_name":"Endocrinology","score":0.8681322336196899},{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.6539692282676697},{"id":"86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","score":0.4219295382499695}],"counts_by_year":[{"year":1978,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1980,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1981,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1982,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":1983,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":1984,"works_count":6,"oa_works_count":1,"cited_by_count":0},{"year":1985,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1986,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1987,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1989,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1990,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1992,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"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":1998,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2006,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":1,"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":0,"oa_works_count":0,"cited_by_count":65},{"year":2013,"works_count":1,"oa_works_count":0,"cited_by_count":46},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":45},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":57},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":59},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":44},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":35},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":39},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":42},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":29},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":40},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":34},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":39},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":41},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":27}],"display_name_alternatives":["Opstad P.","P K Opstad","P K. Opstad","P Opstad","P. K. OPSTAD","P. K. Opstad","P. OPSTAD","P. Opstad","P.-K. OPSTAD","P.K. Opstad","P.\u2010K. Opstad","PerK. Opstad","Perk K. Opstad"],"block_key":"p opstad","works_api_url":"https://api.openalex.org/works?filter=author.id:A5110144087","updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}