1. Prenatal Diagnosis Center The Second Affiliated Hospital of Zhengzhou University Zhengzhou China
2. Prenatal Diagnosis Center Chongqing Maternal and Child Healthcare Hospital Chongqing China
3. Prenatal Diagnosis Center West China Second University Hospital, Sichuan University Chengdu China
4. Department of Obstetrics and Gynecology Maternal and Child Healthcare Hospital of Longhua District Shenzhen China