1. International Research Center for Advanced Structural and Biomaterials, School of Materials Science & Engineering, Beihang University, Beijing 100191, China
2. Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
3. Beijing Advanced Innovation Center for Biomedical Engineering, Beijing 100083, China
4. Beijing Research Institute of Traumatology & Orthopaedics, Beijing 100035, China
5. Department of Materials Science & Engineering, University of California, Berkeley, California 94720, United States