title: Endemic syphilis in Bulgaria.
authors.forename: G
authors.initials: G
authors.lastname: Spirov
mesh_terms: D002031:Bulgaria / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D013587:Syphilis / Q000453:epidemiology*