1. Institute of Tissue Engineering and Stem Cells, Nanchong Central Hospital, The Second Clinical Medical College, North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
2. Department of Biology, North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
3. The First Clinic of Anhui Medical University, Hefei, Anhui 230032, P.R. China
4. Department of Pathophysiology, Anhui Medical University, Hefei, Anhui 230032, P.R. China