Published on in Vol 15, No 11 (2013): November
1 Clinical Prevention Services, BC Centre for Disease Control, Vancouver, BC, Canada
2 School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
3 Department of Medicine, University of British Columbia, Vancouver, BC, Canada
4 BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada
5 Melbourne School of Population and Global Health, University of Melbourne, Victoria, Australia
6 Public Health Agency of Canada, Ottawa, ON, Canada
7 Community Based Research Centre for Gay Men's Health, Vancouver, BC, Canada