{"schema_version":"1","generated_at":"2026-10-28T22:21:55.738Z","data_as_of":null,"url":"https://www.findmykol.com/kol/ronald-vollenhoven","json_url":"https://www.findmykol.com/kol/ronald-vollenhoven/profile.json","record_kind":"basic","profile_kind":"research","person":{"slug":"ronald-vollenhoven","name":"Ronald van Vollenhoven","specialty":"Medicine","therapeutic_area":"Rheumatology/Immunology","therapeutic_areas":["Rheumatology/Immunology"],"institution":"Semmelweis University","institution_url":"https://www.findmykol.com/institution/semmelweis-university","register":{"country":"HU"}},"identifiers":{"orcid":"0000-0001-6438-8663","openalex":"A5012009272"},"summary":"Ronald van Vollenhoven is a Rheumatology/Immunology researcher affiliated with Semmelweis University. OpenAlex indexes 991 publications with 67,378 citations (h-index 116); ClinicalTrials.gov lists 4 registered studies matched to this name.","overview":null,"focus":{"indications":[],"research_topics":["Rheumatology/Immunology"]},"scholarship":{"works_count":991,"cited_by_count":67378,"h_index":116,"source":"works"},"trials":{"shown":0,"withheld":0,"rows":[],"source":"trials"},"payments":{"note":"Not applicable. This profile is anchored outside the United States, where CMS Open Payments and Medicare prescribing do not report."},"similar":[{"name":"Béla Péter Merkely","slug":"bela-merkely","institution":"Semmelweis University","url":"https://www.findmykol.com/kol/bela-merkely","json_url":"https://www.findmykol.com/kol/bela-merkely/profile.json"},{"name":"Richard G. Pestell","slug":"richard-pestell","institution":"Semmelweis University","url":"https://www.findmykol.com/kol/richard-pestell","json_url":"https://www.findmykol.com/kol/richard-pestell/profile.json"},{"name":"Peter Willeit","slug":"peter-willeit","institution":"Semmelweis University","url":"https://www.findmykol.com/kol/peter-willeit","json_url":"https://www.findmykol.com/kol/peter-willeit/profile.json"},{"name":"Nigel Mackman","slug":"nigel-mackman","institution":"Semmelweis University","url":"https://www.findmykol.com/kol/nigel-mackman","json_url":"https://www.findmykol.com/kol/nigel-mackman/profile.json"},{"name":"David Felson","slug":"david-felson","institution":"Boston University","specialty":"Rheumatology","url":"https://www.findmykol.com/kol/david-felson","json_url":"https://www.findmykol.com/kol/david-felson/profile.json"},{"name":"Marc Hochberg","slug":"marc-hochberg","institution":"University of Maryland School of Medicine","specialty":"Rheumatology","url":"https://www.findmykol.com/kol/marc-hochberg","json_url":"https://www.findmykol.com/kol/marc-hochberg/profile.json"},{"name":"Philip Mease","slug":"philip-mease","specialty":"Rheumatology","url":"https://www.findmykol.com/kol/philip-mease","json_url":"https://www.findmykol.com/kol/philip-mease/profile.json"},{"name":"Michelle Petri","slug":"michelle-petri","institution":"Johns Hopkins University School of Medicine","specialty":"Rheumatology","url":"https://www.findmykol.com/kol/michelle-petri","json_url":"https://www.findmykol.com/kol/michelle-petri/profile.json"}],"coverage":{"note":"A basic record from the physician directory. Sections absent here were not yet checked for this person, so absence means not yet looked, never none found.","not_yet_checked":["funding","congress","network","presence","recognition"]},"not_included":{"note":"This document is the public layer: neutral facts cited to their source. Judgments (influence tier, archetype, trajectory commentary) and the itemized rows past each section's public teaser are account features and are not served here or to crawlers.","withheld_rows":{}},"sources":{"orcid":{"name":"ORCID","url":"https://orcid.org","provides":"The verified researcher identity that anchors authorship"},"works":{"name":"OpenAlex","url":"https://openalex.org","provides":"Citations, h-index, research topics, most-cited works and congress abstracts"},"trials":{"name":"ClinicalTrials.gov","url":"https://clinicaltrials.gov","provides":"Investigator roles on registered clinical studies"}},"methodology_url":"https://www.findmykol.com/about#methodology"}