Ke Lu1,2, Yi-Jun Gao2, Qi-Rong Dong3. 1. Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, 1055 Sanxiang Road, Suzhou, 215004, Jiangsu, China. 2. Department of Joint Surgery, Affiliated Kunshan Hospital of Jiangsu University, Suzhou, 215300, Jiangsu, China. 3. Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, 1055 Sanxiang Road, Suzhou, 215004, Jiangsu, China. dongqirong@suda.edu.cn.