title: Primary and secondary syphilis. Country of origin study, 1969. British Cooperative Clinical Group.
mesh_terms: D001208:Asia; D004739:England; D005260:Female; D006069:Gonorrhea / Q000453:epidemiology; D006801:Humans; D008297:Male; D044469:Racial Groups; D012606:Scotland; D012737:Sex Factors; D013587:Syphilis / Q000453:epidemiology*; D014852:Wales; D014900:West Indies