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China
Bahamas
HIV Infections
Sexually Transmitted Diseases
Substance-Related Disorders
Risk-Taking
Questionnaires
Sexual Behavior
Health Knowledge, Attitudes, Practice
Condoms
Attitude to Health
Unsafe Sex
Cross-Sectional Studies
Rural Population
Risk Factors
Socioeconomic Factors
Interviews as Topic
Urban Population
Transients and Migrants
Sexual Partners
Co-Publications
18
12
10
7
6
5
4
3
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