1. Department of Orthopaedics, Tangdu Hospital, Fourth Military Medical University, Xi’an, China
2. Department of Outpatient, Xijing Hospital, Fourth Military Medical University, Xi’an, China
3. Department of Orthopaedics, Air Force Medical Center, Fourth Military Medical University, Beijing, China
4. Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi’an, China