1. Medical genetic department The Affiliated Hospital of Qingdao University Qingdao China
2. Prenatal Diagnosis Center The Affiliated Hospital of Qingdao University Qingdao China
3. Department of gynecology and obstetrics The Affiliated Hospital of Qingdao University Qingdao China
4. Clinical Laboratory The Affiliated Hospital of Qingdao University Qingdao China