title: Commentary: the legacy of Sidney Kark.
authors.forename: Costa
authors.initials: C
authors.lastname: Gazi
mesh_terms: D015658:HIV Infections / Q000453:epidemiology*; D006291:Health Policy; D049673:History, 20th Century; D006801:Humans; D013019:South Africa / Q000453:epidemiology; D013587:Syphilis / Q000266:history