Affiliations
*Department of Obstetrics, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
†Zhejiang University School of Medicine, Hangzhou, China
‡Department of Ultrasound, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
§Changxing Maternity and Child Health Care Hospital, Huzhou, China
Authors contributed equally to this study.