[1] University of Montreal,Faculty of Medicine
[2] McGill University,Department of Neurology and Neurosurgery
[3] McGill University,Department of Orthopaedic Surgery
[4] Centre Hospitalier de l’Université de Montréal,Department of Neurosurgery
[5] and Occupational Health,Department of Epidemiology
[6] McGill University,Department of Neurosurgery, King Fahad Medical City
[7] National Neuroscience Institute,Department of Orthopaedic Surgery
[8] University of California San Francisco,undefined
[9] Centre Hospitalier Universitaire Sainte-Justine,undefined