1. Department of Orthopaedics, Beijing United Family Healthcare, Beijing, China
2. Joint Surgery Department of Orthopaedics, The Third Hospital of Changsha, Changsha, China
3. Trauma Department of Orthopaedics, The First Affiliated Hospital of South China University, Hengyang, China
4. Joint Surgery Department of Orthopaedics, Changsha Central Hospital, Changsha, China