1. Department of Obstetrics and Gynaecology The Chinese University of Hong Kong Hong Kong SAR China
2. Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen China
3. Genetics and Prenatal Diagnosis Center The First Affiliated Hospital of Zhengzhou University Zhengzhou China
4. Department of Fetal Medicine and Prenatal Diagnosis The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
5. Department of Central Laboratory, Shenzhen Baoan Women's and Children's Hospital Jinan University Guangdong China
6. The Chinese University of Hong Kong Baylor College of Medicine Joint Center for Medical Genetics, The Chinese University of Hong Kong Hong Kong SAR China