1. Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.
2. Department of Medicine, Faculty of Medicine, Centre of Excellence for Research in AIDS, University of Malaya, Kuala Lumpur, Malaysia.
3. Department of Medicine, Infectious Disease Unit, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
4. Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
5. Department of Society and Health, Faculty of Social Sciences and Humanities, Mahidol University, Nakhon Pathom, Thailand.
6. Center of Excellence in Research on Gender, Sexuality and Health, Faculty of Social Sciences and Humanities, Mahidol University, Nakhon Pathom, Thailand.
7. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA.