1. Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, People’s Republic of China
2. Institute of HIV/AIDS/STI Prevention and Control, Jiangsu Provincial Center for Diseases Control and Prevention, Nanjing, People’s Republic of China
3. Jiangsu Cancer Hospital, The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China