1. Department of Gynecology and Obstetrics, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
2. Department of General Surgery, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
3. Department of Gynecology, People's Hospital of Xinjiang Uygur, Urumqi, Xinjiang Uygur Autonomous Region 830001, P.R. China
4. Department of Stomatology, Quzhou No. 2 People's Hospital, Jinhua, Zhejiang 321000, P.R. China