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Sexual Behavior
Heterosexuality
Condoms
Data Collection
Great Britain
Sex Distribution
Age Distribution
Prevalence
Marital Status
Social Class
Educational Status
Feasibility Studies
Socioeconomic Factors
HIV Infections
Chlamydia Infections
Sexually Transmitted Diseases
Chlamydia trachomatis
African Continental Ancestry Group
Population Surveillance
Ligase Chain Reaction
Co-Publications
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