1. Department of Molecular Orthopedics, Beijing Research Institute of Traumatology and Orthopedics, Beijing 100035, P.R. China
2. Animal Laboratory, Beijing Research Institute of Traumatology and Orthopedics, Beijing 100035, P.R. China
3. Department of Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, P.R. China
4. Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing 100035, P.R. China