[World-wide epidemiological tendencies of syphillis and blenorrhagia].
D006069:Gonorrhea / Q000453:epidemiology*; D006801:Humans; D007391:International Cooperation; D012924:Social Conditions; D013587:Syphilis / Q000453:epidemiology*
Tendencias epidemiológicas mundiales de la sífilis y la blenorragia.