HIV-related knowledge and behaviors among high school students--selected U.S. sites, 1989.
D005260:Female; D015658:HIV Infections / Q000517:prevention & control*; D006266:Health Education / Q000639:trends*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D012572:School Health Services; D012725:Sexual Behavior; D011795:Surveys and Questionnaires; D014481:United States