1. Department of the Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, ZJ, China
2. Department of Obstetrics, Hangzhou Women’s Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, ZJ, China
3. Department of Prenatal Diagnosis and Screening Center, Hangzhou Women’s Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, ZJ, China