1. The Department of Orthopaedic Surgery, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China.
2. School of Medicine, Dentistry, and Biomedical Sciences, Queen's University Belfast, Belfast, United Kingdom.
3. The Shanxi Eye Hospital, Taiyuan, P.R. China.
4. Orthopaedic Department, Xiehe Hospital, Tongji Medical Collage of Huazhong University of Science and Technology, Wuhan, P.R. China.
5. Stem Cells and Regeneration Research Group, Department of Orthopaedics & Traumatology, Faculty of Medicine, Li Ka Shing Institute of Health Sciences, The Chinese University Hong Kong, Shatin, Hong Kong, P.R. China.