1. Department of Orthopaedics, Chengdu Military General Hospital, Chengdu, Sichuan Province 610036, China
2. Department of Orthopaedics, Fuping Couty Hospital, Fuping, Shaanxi Province, 711700, China
3. Institute of Orthopaedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 71000, China