1. Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China Maternal and Child Health Care Hospital of Shandong Province Affiliated to Qingdao University Jinan Shandong China
2. Institute for Fetology, The First Affiliated Hospital of Soochow University Suzhou China
3. Department of Obstetrics and Gynecology The Third People’s Hospital of Bengbu Affiliated to Bengbu Medical College Bengbu Anhui Province China
4. Center for Medical Genetics and Prenatal Diagnosis, Key Laboratory of Birth Defect Prevention and Genetic Medicine of Shandong Health Commission Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Qingdao University Jinan Shandong China