1. Laboratory of Bone Tissue Engineering of Beijing Research Institute of Traumatology and Orthopaedics
2. Beijing 100035
3. China
4. Beijing Laboratory of Biomedical Materials
5. Beijing University of Chemical Technology
6. Beijing 100029
7. Department of neurosurgery of Beijing JiShuiTan Hospital
8. The Fourth Clinical Medical College of Peking University
9. Department of Spine Surgery of Beijing JiShuiTan Hospital