1. Key Laboratory of Biomechanics and Mechanobiology of Ministry of Education, Beijing, China
2. Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
3. Department of Spine Surgery, Beijing Jishuitan Hospital, the Fourth Clinical Medical College of Peking University, Beijing, China
4. School of Engineering Medicine, Beihang University, Beijing, China