1. Department of Pathology, Fuling Central Hospital, 2 Gaosuntang Road, Chongqing 408099, P.R. China
2. Department of Gynaecology and Obstetrics, Fuling Central Hospital, 2 Gaosuntang Road, Chongqing 408099, P.R. China
3. Department of Pathophysiology, Chongqing Medical University, 1 Yixueyuan Road, Chongqing 400016, P.R. China
4. College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, 188 Tanhualin Road, Wuhan 430061, P.R. China
5. Laboratory of Stem Cell and Tissue Engineering, Chongqing Medical University, 1 Yixueyuan Road, Chongqing 400016, P.R. China