1. State Key Laboratory of Tribology
2. Department of Mechanical Engineering
3. Tsinghua University
4. Beijing 100084
5. China
6. Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases
7. Shanghai Institute of Traumatology and Orthopaedics
8. Ruijin Hospital
9. Shanghai Jiao Tong University School of Medicine
10. Shanghai 200025
11. Department of Biomedical Engineering
12. The Hong Kong Polytechnic University
13. Hong Kong SAR