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Daher MT, Daher S, Nogueira-Barbosa MH, Defino HL.Daher MT, et al.Eur Spine J. 2011 Nov;20(11):1908-14. doi: 10.1007/s00586-011-1879-2. Epub 2011 Jun 21.Eur Spine J. 2011.PMID: 21691900Free PMC article.