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AE declares institutional research support from Medtronic and the NIH. JB declares research support from the Department of Defense, DePuy Synthes, FocusStart, Medtronic, NIH (NIAID, NIAMS, NICHD), SI-Bone, and Zimmer Biomet; is an American Society of Biomechanics board\/committee member; and is on an editorial\/governing board, receives publishing royalties, and financial\/material support from JBJS\u2014American. DP declares consulting fees from Globus Medical and Alexion; institutional grant\/research support from Medtronic and MizuhoOSI; consulting fees, royalties, and honoraria from SI-Bone; and royalties\/other financial\/material support from Springer.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This study was approved by the University of Minnesota Institutional Review Board.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval\/review"}}]}}