1. Department of Epidemiology and Statistics, West China School of Public Health, Sichuan University, Chengdu 610041, Sichuan Province, China
2. Center of Infectious Disease, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
3. Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
4. Department of Urology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China