title: Early work on syphilis: Diaz de Ysla's treatise on the serpentine disease of Hispaniola Island.
authors: Faculdade de Medicine Porto, Portugal.
authors: A A
authors: AA
authors: de Ricon-Ferraz
mesh_terms: D049669:History, 16th Century; D006801:Humans; D008374:Manuscripts, Medical as Topic / Q000266:history; D011174:Portugal; D013587:Syphilis / Q000266:history* / Q000473:pathology / Q000628:therapy