Subjects: *HIV infection risk factors; *HIV prevention; *CROSS-sectional methodUNITED States
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Subjects: *HIV infection risk factors; *RISK-taking behavior; *CLUSTER samplingUGANDA
Subjects: *HIV infection risk factors; *SEXUALLY transmitted disease risk factors; *RISK-taking behaviorTAIWAN
Subjects: *HIV infection risk factors; *ALCOHOLISM; *CONFIDENCE intervalsPERU
Subjects: *HIV infection epidemiology; *HIV infection risk factors; *HIV infectionsIRELAND
Subjects: *HIV infection risk factors; *HIV prevention; *HEALTH services accessibilitySWITZERLAND
Subjects: *HIV infection risk factors; *DIAGNOSIS of HIV infections; *HIV infection epidemiologyBRAZIL
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Subjects: *HIV infection risk factors; *CONFIDENCE intervals; *SURVEYSSOUTH Africa
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