1. Department of Preventive Medicine/the Key Laboratories for Xinjiang Endemic and Ethnic Diseases, School of Medicine, Shihezi University, Shihezi 832003, Xinjiang, China
2. Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, 210019 Nanjing, China
3. Department of Endemic Disease, Shihezi Center for Disease Control and Prevention, Shihezi 832003, Xinjiang, China