1. Majoring in epidemiology, National Center for Birth Defects Monitoring of China, West China Second Hospital, Sichuan University, Chengdu 610041, China; Public Health School, Sichuan University of China, Chengdu 610041, China
2. Public Health School, Sichuan University of China, Chengdu 610041, China
3. National Center for Birth Defects Monitoring of China, West China Second Hospital, Sichuan University, Chengdu 610041, China
4. Dean of West China Second Hospital of Sichuan University, Professor of Pediatrics, National Center for Birth Defects Monitoring of China, West China Second Hospital, Sichuan University, Chengdu 610041, China
5. Executive Director of National Center for Birth Defects Monitoring of China, Professor of Epidemiology and Public Health, National Center for Birth Defects Monitoring of China, West China Second Hospital, Sichuan University, Chengdu 610041, China