Sexually transmitted diseases.
Pearce
R B
RB
D000328:Adult; D005873:Giardiasis / Q000453:epidemiology / Q000517:prevention & control; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control; D015497:HIV-1; D006716:Homosexuality; D006801:Humans; D012749:Sexually Transmitted Diseases / Q000453:epidemiology* / Q000517:prevention & control