1. School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, People’s Republic of China
2. School of Public Health, Sun Yat-sen University, Guangzhou, People’s Republic of China
3. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
4. Wuxi Municipal Center for Disease Control and Prevention, Wuxi, People’s Republic of China
5. Shenzhen Longhua District Center for Disease Control and Prevention, Shenzhen, People’s Republic of China
6. Qingdao Qingtong AIDS Prevention Volunteer Service Center, Qingdao, People’s Republic of China
7. Foshan Friends Care Center for AIDS/HIV Control, Foshan, People’s Republic of China
8. Zhitong LGBT Service Center, Guangzhou, People’s Republic of China;
9. School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
10. School of Public Health, Southwest Medical University, Luzhou, People’s Republic of China
11. Department of AIDS/STD Control and Prevention, Chongqing Center for Disease Control and Prevention, Chongqing, People’s Republic of China
12. Department of AIDS/STD Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen, People’s Republic of China
13. Department of AIDS/STD Control and Prevention, Tianjin Center for Disease Control and Prevention, Tianjin, People’s Republic of China
14. School of Public Health, Yale University, New Haven, CT, USA
15. Kirby Institute, University of New South Wales, Sydney, Australia