1. Gemmological InstituteChina University of Geosciences Wuhan 430074 P. R. China
2. School of Biomedical Engineering and Med‐X Research InstituteShanghai Jiao Tong University Shanghai 200030 P. R. China
3. School of Mechanical and Automotive EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
4. School of Engineering Materials ScienceQueen Mary University of London London E1 4NS UK
5. Mechanical EngineeringUniversity of Birmingham Birmingham B15 2TT UK
6. Department of Spine Surgery and Musculoskeletal TumorZhongnan Hospital of Wuhan University Wuhan 430074 P. R. China
7. WMGMaterials Engineering CentreUniversity of Warwick Coventry CV4 7AL UK