1. Department of Infectious Diseases Tianjin Second People’s Hospital Tianjin China
2. Tianjin Association of STD/AIDS Prevention and Control Tianjin China
3. Department of Infectious Diseases Nanjing Lishui People’s Hospital Nanjing Jiangsu China
4. Division of Infectious Diseases Chongqing Public Health Medical Center Chongqing China
5. College of Basic Medicine Chongqing Medical University Chongqing China