1. Reproductive Medicine Center, Drum Tower Clinic Medical College of Nanjing Medical University, Nanjing 210008, China
2. Reproductive Medicine Center, Department of Obstetrics and Gynecology, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
3. Department of Obstetrics and Gynecology, Wuxi People’s Hospital Affiliated with Nanjing Medical University, Wuxi 214002, China