1. Department of Traumatic Orthopedics, Tianjin Hospital, Tianjin, P.R. China
2. Department of Orthopedics Emergency, Tianjin Hospital, Tianjin, P.R. China
3. Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, P.R. China
4. Department of Orthopedics, Tianjin Hospital, Tianjin, P.R. China