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Sharma S, Wu C, Andersen T, Wang Y, Hansen ES, Bünger CE.Sharma S, et al. Among authors: hansen es.Eur Spine J. 2013 Jun;22(6):1230-49. doi: 10.1007/s00586-012-2542-2. Epub 2012 Oct 21.Eur Spine J. 2013.PMID: 23085815Free PMC article.Review.