From the International Collaboration on Repair Discoveries (J.W.S., C.R.W., B.K.K.); MD/PhD Training Program (J.W.S.), School of Kinesiology (C.R.W.), and Department of Orthopaedics (R.C.-M., J.S., T.A., S. Paquette, N.D., C.G.F., M.F.D.), University of British Columbia; Vancouver Spine Program (L.M.B., A.T., L.R.), Vancouver General Hospital, British Columbia; Department of Surgery (J.-M.M.-T., S. Parent), Hôpital du Sacré-Coeur de Montréal, and Chu Sainte-Justine (S.C.), Department of Surgery, Université de Montréal, Quebec; Division of Orthopaedic Surgery (C.B.), London Health Sciences Centre, University of Western Ontario, Canada; Department of Neurological Surgery (S.D.), University of California, San Francisco; Vancouver Spine Surgery Institute (R.C.-M., J.S., T.A., S. Paquette, N.D., C.G.F., M.F.D., B.K.K.); and Division of Neurosurgery (B.K.K.), University of British Columbia, Blusson Spinal Cord Centre, Vancouver, Canada.