1. Genetic Testing Center, Qingdao Women & Children Hospital Qingdao University Qingdao China
2. The Center of Prenatal Diagnosis Affiliated Hospital of Guizhou Medical University Guiyang China
3. Central Lab Wuxi Maternity and Child Health Care Hospital, Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University Wuxi, Jiangsu China
4. Annoroad Gene Technology Co., Ltd Beijing China
5. The Branch Center of Prenatal Diagnosis Hebei Maternity and Child Healthcare Hospital Shijiazhuang China
6. Department of Obstetrics First Affiliated Hospital of Xinjiang Medical University Urumqi China
7. Department of Obstetrics and Gynecology Wuhan Women and Child Care Service Hospital Wuhan China