1. Department of Orthopaedic Trauma Dept. 2, the Third Hospital of Shijiazhuang, Shijiazhuang, Hebei, China
2. Department of Orthopaedic Surgery Dept. 3, People's Hospital of Luancheng, Shijiazhuang, Hebei, China
3. Department of Orthopaedic Surgery, Liulintun Center Health Hospital of Luancheng, Shijiazhuang, Hebei, China
4. Department of Spine Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.