1. Department of Orthopedics, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, P.R. China
2. Department of Infections, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, P.R. China
3. Department of Gynaecology and Obstetrics, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, P.R. China