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Sabel M, Stummer W.Sabel M, et al. Among authors: stummer w.Eur Spine J. 2004 Oct;13 Suppl 1(Suppl 1):S97-101. doi: 10.1007/s00586-004-0735-z. Epub 2004 May 15.Eur Spine J. 2004.PMID: 15480824Free PMC article.