Filtering by: Year 2015 Remove constraint Year: 2015 Keyword Biological measures of unprotected sex Remove constraint Keyword: Biological measures of unprotected sex Keyword HIV discordant couples Remove constraint Keyword: HIV discordant couples Keyword Indicators of Unprotected sex Remove constraint Keyword: Indicators of Unprotected sex Keyword Validation of self-reported sexual behaviour Remove constraint Keyword: Validation of self-reported sexual behaviour