1. Department of Orthopedic Surgery; Mayo Clinic; 200 First Street SW Rochester Minnesota 55905
2. Department of Occupational and Environmental Medicine; HealthPartners; Minnesota
3. Department of Orthopedic Surgery; Tongji Medical College; Huazhong University of Science and Technology; Tongji Hospital; Wuhan P.R. China
4. Department of Orthopedic Surgery; Tongji Medical College; Huazhong University of Science and Technology; Puai Hospital; Wuhan P.R. China
5. Department of Orthopedic Surgery; The First Hospital of China Medical University; No.155, Nanjing Bei Street Shenyang 110001 P. R. China
6. Department of Neurosurgery; Perelman School of Medicine; University of Pennsylvania; Philadelphia Pennsylvania
7. Department of Orthopaedic Surgery; Perelman School of Medicine; University of Pennsylvania; Philadelphia Pennsylvania
8. Department of Neurosurgery; Mayo Clinic; Rochester Minnesota
9. Department of Physical Medicine and Rehabilitation; Mayo Clinic; Rochester Minnesota
10. Division of Pain Medicine; Department of Anesthesiology; Mayo Clinic; Rochester Minnesota
11. Spine Center; Mayo Clinic; Rochester Minnesota