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Bono CM, Einhorn TA.Bono CM, et al. Among authors: einhorn ta.Eur Spine J. 2003 Oct;12 Suppl 2(Suppl 2):S90-6. doi: 10.1007/s00586-003-0603-2. Epub 2003 Sep 12.Eur Spine J. 2003.PMID: 13680312Free PMC article.Review.