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D000367:Age Factors; D000368:Aged; D005260:Female; D015658:HIV Infections / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission*; D006293:Health Promotion; D006801:Humans; D008297:Male; D008875:Middle Aged; D012944:Social Support; D014481:United States / Q000453:epidemiology