HIV prevention and homosexual men.
D015658:HIV Infections / Q000517:prevention & control*; D015497:HIV-1; D006297:Health Services Accessibility / Q000592:standards*; D006302:Health Services Research; D006716:Homosexuality; D006801:Humans; D008297:Male; D011314:Preventive Health Services / Q000592:standards*; D006113:United Kingdom