1. Guangxi Key Laboratory of AIDS Prevention and Treatment & School of Public Health, Guangxi Medical University, Nanning, Guangxi, China.
2. The First Affiliated Hospital, Chongqing Medical University, Chongqing, China.
3. School of Public Health, Xinjiang Medical University, Urumqi, China.
4. School of Public Health, Chongqing Medical University, Chongqing, China.
5. National Center for STD Control, China Centers for Disease Control and Prevention, Nanjing, China.
6. State Key Laboratory of Infectious Disease Prevention and Control (SKLID), Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention (China CDC), Beijing, China.
7. Guangxi Key Laboratory of AIDS Prevention and Treatment & Life Sciences Institute, Guangxi Medical University, Nanning, Guangxi, China.