1. Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei , People’s Republic of China
2. Department of Obstetrics and Gynecology, Guangshui Second People’s Hospital of Hubei Province , Suizhou , People’s Republic of China
3. Shenzhen Huazhong University of Science and Technology Research Institute , Shenzhen , People’s Republic of China