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Karlo CA, Steurer-Dober I, Leonardi M, Pfirrmann CW, Zanetti M, Hodler J.Karlo CA, et al.Eur Spine J. 2010 Oct;19(10):1771-5. doi: 10.1007/s00586-010-1430-x. Epub 2010 May 15.Eur Spine J. 2010.PMID: 20473623Free PMC article.