1. National Centre in HIV Social Research, University of New South Wales, Sydney, Australia
2. Australian Research Centre in Sex, Health and Society, La Trobe University, Melbourne, Australia
3. Department of Psychology, University of Sussex, Brighton, UK
4. National Centre in HIV Epidemiology and Clinical Research, University of New South Wales, Sydney, Australia
5. Health Promotion Unit, Sydney South West Area Health Service (Eastern Zone), Sydney, Australia