1. Center for Reproductive Medicine, Drum Tower Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China
2. Department of Obstetrics and Gynecology, Yuncheng Central Hospital, Shanxi Medical University, Yuncheng, Shanxi, China
3. Department of Radiology, The General Hospital of Eastern Theater Command of the Chinese People’s Liberation Army (PLA), Nanjing, Jiangsu, China
4. School of Biomedical Engineering, Bio-ID Center, Shanghai Jiao Tong University, Shanghai, China
5. Center for Reproductive Medicine, Department of Obstetrics and Gynecology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China