1 Tianjin Key Laboratory of Spine and Spinal Cord, International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, International Chinese Musculoskeletal Research Society Collaborating Center for Spinal Cord Injury, Tianjin, China.
2 Shandong University Center for Orthopaedics, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.