The man behind the eponym: John P. O'Brien--ctinic granuloma (O'Brien).
Steffen
Charles
C
1717 Avocado Road, Oceanside CA 92054, USA.
D001315:Australia; D004850:Eponyms; D016460:Granuloma Annulare / Q000266:history* / Q000473:pathology; D049673:History, 20th Century; D049711:History, Modern 1601-; D010336:Pathology / Q000266:history*