1. Key Laboratory of Public Health Safety of Ministry of Education; Department of Epidemiology; School of Public Health; Fudan University; Shanghai China
2. Dehong Prefecture Center for Disease Control and Prevention; Mangshi Yunnan Province China
3. Dehong Prefecture Hospital; Mangshi Yunnan Province China
4. Yunnan Center for Disease Control and Prevention; Kunming Yunnan Province China
5. National Center for AIDS/STD Control and Prevention (NCAIDS); Chinese Center for Disease Control and Prevention (China CDC); Beijing China