Subjects: HIV infection risk factors; SEXUALLY transmitted disease risk factors; COLLEGE studentsSOUTH Africa
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Subjects: HIV infection risk factors; DIAGNOSIS of HIV infections; INFECTIOUS disease transmissionNIGERIA
Subjects: HIV prevention; HIV infection risk factors; HIV infection epidemiologyNIGERIA
Subjects: HIV infection risk factors; CHI-squared test; CONFIDENCE intervalsLIBERIA
Subjects: HIV infection risk factors; CONCEPTUAL structures; CONDOMSBOTSWANA
Subjects: HIV prevention; HIV infection risk factors; CONFIDENCE intervalsKENYA
Subjects: HIV infection risk factors; POVERTY areas; CHI-squared testKENYA
Subjects: AIDS prevention; AIDS risk factors; AIDS treatmentNIGERIA