Ke Lu1, Hong-Zhen Wang2, Hui-Qiang Shan3, Qi-Rong Dong4. 1. Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215004, China; Department of Joint Surgery, Affiliated Kunshan Hospital of Jiangsu University, Suzhou, Jiangsu, 215300, China. Electronic address: sgu8434@sina.com. 2. Department of Joint Surgery, Affiliated Kunshan Hospital of Jiangsu University, Suzhou, Jiangsu, 215300, China. Electronic address: whz12345788@163.com. 3. Department of Spinal Surgery, Affiliated Kunshan Hospital of Jiangsu University, Suzhou, Jiangsu, 215300, China. Electronic address: hawkshan@126.com. 4. Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215004, China. Electronic address: dongqirong@suda.edu.cn.