1. Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center; Guangzhou Medical University; Guangzhou Guangdong China
2. Guanzghou Umbilical Cord Blood Bank, Guangzhou Women and Children's Medical Center; Guangzhou Medical University; Guangzhou Guangdong China
3. Epidemiology Division, Guangdong Cardiovascular Institute; Guangdong General Hospital; Guangzhou Guangdong China