1. National Center for Birth Defect MonitoringWest China Second University Hospital, Sichuan University Chengdu China
2. Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University)Ministry of Education Chengdu China
3. Department of Neonatal Disease ScreeningMaternal and Child Health Hospital of Zaozhuang Zaozhuang China
4. Department of UltrasoundHarbin Red Cross Central Hospital Harbin China
5. Department of PediatricsMianyang Central Hospital Mianyang China