{"schema_version":"1","generated_at":"2026-11-02T15:55:23.934Z","data_as_of":null,"url":"https://www.findmykol.com/kol/p-hagen","json_url":"https://www.findmykol.com/kol/p-hagen/profile.json","record_kind":"basic","profile_kind":"research","person":{"slug":"p-hagen","name":"P. Martin van Hagen","specialty":"Medicine","therapeutic_area":"Ophthalmology","therapeutic_areas":["Ophthalmology"],"institution":"Chulalongkorn University","institution_url":"https://www.findmykol.com/institution/chulalongkorn-university","register":{"country":"TH"}},"identifiers":{"orcid":"0000-0003-0854-2368","openalex":"A5016878392"},"summary":"P. Martin van Hagen is an Ophthalmology researcher affiliated with Chulalongkorn University. OpenAlex indexes 314 publications with 10,795 citations (h-index 56).","overview":null,"focus":{"indications":[],"research_topics":["Ophthalmology"]},"scholarship":{"works_count":314,"cited_by_count":10795,"h_index":56,"source":"works"},"payments":{"note":"Not applicable. This profile is anchored outside the United States, where CMS Open Payments and Medicare prescribing do not report."},"similar":[{"name":"Berthold Viktor Koletzko","slug":"berthold-koletzko","institution":"Chulalongkorn University","url":"https://www.findmykol.com/kol/berthold-koletzko","json_url":"https://www.findmykol.com/kol/berthold-koletzko/profile.json"},{"name":"Yasuhiko Tabata","slug":"yasuhiko-tabata","institution":"Chulalongkorn University","url":"https://www.findmykol.com/kol/yasuhiko-tabata","json_url":"https://www.findmykol.com/kol/yasuhiko-tabata/profile.json"},{"name":"Ahmed Omar Bali","slug":"ahmed-bali","institution":"Chulalongkorn University","url":"https://www.findmykol.com/kol/ahmed-bali","json_url":"https://www.findmykol.com/kol/ahmed-bali/profile.json"},{"name":"Hirofumi Tanaka","slug":"hirofumi-tanaka","institution":"Chulalongkorn University","url":"https://www.findmykol.com/kol/hirofumi-tanaka","json_url":"https://www.findmykol.com/kol/hirofumi-tanaka/profile.json"},{"name":"Emily Chew","slug":"emily-chew","institution":"National Eye Institute","specialty":"Ophthalmology","url":"https://www.findmykol.com/kol/emily-chew","json_url":"https://www.findmykol.com/kol/emily-chew/profile.json"},{"name":"Robert Weinreb","slug":"robert-weinreb","institution":"University of California San Diego","specialty":"Ophthalmology","url":"https://www.findmykol.com/kol/robert-weinreb","json_url":"https://www.findmykol.com/kol/robert-weinreb/profile.json"},{"name":"Harry Quigley","slug":"harry-quigley","institution":"Johns Hopkins University School of Medicine","specialty":"Ophthalmology","url":"https://www.findmykol.com/kol/harry-quigley","json_url":"https://www.findmykol.com/kol/harry-quigley/profile.json"},{"name":"Joel Schuman","slug":"joel-schuman","institution":"Wills Eye Hospital","specialty":"Ophthalmology","url":"https://www.findmykol.com/kol/joel-schuman","json_url":"https://www.findmykol.com/kol/joel-schuman/profile.json"}],"coverage":{"note":"A basic directory record. 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"}},"methodology_url":"https://www.findmykol.com/about#methodology"}