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Richard M. Schwend: consultant for Orthopediatrics (outside the scope of the study). Todd Ritzman: grant\/research support and consultant for Medtronic, honorarium from Stryker\/K2M Spine and stock\/shareholder for Apto Orthopaedics (all outside the scope of the study). Lorena Floccari: none. Carl-\u00c9ric Aubin: supported by the Natural Sciences and Engineering Research Council of Canada (Industrial Research Chair with Medtronic Canada), and consultant for Medtronic (outside the scope of the study). All authors declare that they have no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}]}}