1 Department of Gynecology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu Province, China (all authors).
2 Department of Gynecology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu Province, China (all authors). Electronic address: xiaohao512006@126.com.