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Koller H, Hempfing A, Acosta F, Fox M, Scheiter A, Tauber M, Holz U, Resch H, Hitzl W.Koller H, et al. Among authors: holz u.Eur Spine J. 2008 Apr;17(4):523-38. doi: 10.1007/s00586-007-0572-y. Epub 2008 Jan 26.Eur Spine J. 2008.PMID: 18224358Free PMC article.