1. Department of HIV/AIDS and STDs Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, People’s Republic of China
2. State Key Laboratory for Infectious Disease Prevention and Control, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People’s Republic of China
3. Division of AIDS/TB Prevention and Control, Jiaxing Municipal Center for Disease Control and Prevention, Jiaxing, People’s Republic of China
4. Department of AIDS and STD, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People’s Republic of China