1. Department of Spine surgery Honghui Hospital, School of Medicine, Xi‘an Jiaotong University Shaanxi China
2. Department of Orthopedics The Second Affiliated Hospital of Harbin Medical University Harbin China
3. The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education Heilongjiang China
4. Department of Neuroscience Johns Hopkins University Baltimore Maryland