1. Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine; College of Biological Science and Medical Engineering, Donghua University, Shanghai 201620, P. R. China
2. Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
3. Department of Trauma Orthopaedics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, P. R. China