title: Genetic landmarks through philately--porphyria and its effect on world history.
authors: Department of Pediatrics and Child Health, Children's Hospital, and University of Manitoba, Winnipeg, Canada. chudley@cc.umanitoba.ca
authors: A E
authors: AE
authors: Chudley
authors: J C
authors: JC
authors: Haworth
mesh_terms: D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D010678:Philately; D011164:Porphyrias / Q000235:genetics / Q000266:history*; D006113:United Kingdom