1. Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Sha Tin, Hong Kong, SAR 999077, P.R. China
2. Division of General Surgery, Peking University First Hospital, Peking University, Beijing 100000, P.R. China
3. Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, Guangdong 510005, P.R. China
4. Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Sha Tin, Hong Kong, SAR 999077, P.R. China