1. School of Public Health, Sun Yat-sen University, Guangzhou, China
2. School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
3. Shenzhen Longhua District Center for Disease Control and Prevention, Shenzhen, China
4. Qingdao Qingtong AIDS Prevention Volunteer Service Center, Qingdao, China
5. Foshan Friends Care Center for AIDS/HIV Control, Foshan, China
6. Zhitong LGBT Service Center, Guangzhou, China
7. Wuxi Municipal Center for Disease Control and Prevention, Wuxi, China
8. Kirby Institute, University of New South Wales, Sydney, Australia