title: A tribute to Professor Ralph Hendrickse.
authors: Department of Global Health and Population, Harvard School of Public Health, Cambridge, Massachusetts, USA. ADELUCAS@aol.com
authors: Adetokunbo O
authors: AO
authors: Lucas
mesh_terms: D004501:Education, Medical / Q000266:history; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D010372:Pediatrics / Q000266:history*; D010506:Periodicals as Topic / Q000266:history; D013019:South Africa; D014330:Tropical Medicine / Q000266:history*