1. Department of Orthopedics, Peking University Third Hospital, Beijing 100191, People’s Republic of China
2. Beijing Key Laboratory of Spinal Diseases, Beijing 100191, People’s Republic of China
3. Center for
Biomedical Materials and Tissue Engineering, Academy for Advanced
Interdisciplinary Studies, Peking University, Beijing 100871, People’s Republic of China
4. Department
of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, People’s Republic of China