1. School of Medicine Southeast University Nanjing Jiangsu China
2. Department of Obstetrics and Gynecology Zhongda Hospital, School of Medicine, Southeast University Nanjing Jiangsu China
3. Institute of Women's Life and Health Southeast University Nanjing Jiangsu China
4. Department of Obstetrics and Gynecology The First People's Hospital of Zhangjiagang Zhangjiagang Jiangsu China
5. Department of Obstetrics and Gynecology The Huai'an Maternity and Child Healthcare Hospital, Yangzhou University Medical School Huai'an Jiangsu China