1. Department of Gynecology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China
2. Department of Gynecology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
3. Department of Gynecology, Kunshan Hospital of Traditional Chinese Medicine, Kunshan, Jiangsu 215300, P.R. China
4. Department of Pathology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China