1. Department of Orthopaedics, Affiliated Hospital of North Sichuan Medical College, Nanchong, P.R. China
2. Key Laboratory of Emergency and Trauma, Ministry of Education, College of Emergency and Trauma, Hainan Medical University, Haikou, P.R. China
3. Department of Orthopaedics, Daping Hospital, Army Medical University, Chongqing, P.R. China
4. Department of Rehabilitation, Affiliated Hospital of North Sichuan Medical College, Nanchong, P.R. China