1. Department of Spinal SurgeryZibo Central Hospital ZiBo China
2. Department of OrthopaedicsRizhao Central Hospital Rizhao China
3. Department of RadiologyZibo Central Hospital ZiBo China
4. Department of OrthopaedicsChongqing University Central Hospital Chongqing China
5. Department of Spinal SurgeryThe Second Hospital of Shandong University Jinan China