1. Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027,, China
2. Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong 515000, China
3. Department of Biomedical Science, Mercer University School of Medicine, Savannah, Georgia 31404, United States
4. Department of Obstetrics and Gynecology, the Taizhou People's Hospital, Taizhou 225300, Jiangsu, China
5. Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China / Department of Biomedical Science, Mercer University School of Medicine, Savannah, Georgia 31404, United States