Stymied sex survey.
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control / Q000635:transmission; D005260:Female; D006801:Humans; D008297:Male; D009316:National Institutes of Health (U.S.); D011057:Politics; D012109:Research Support as Topic; D012725:Sexual Behavior; D014481:United States; D014483:United States Dept. of Health and Human Services