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Deen HG, Aranda-Michel J, Reimer R, Miller DA, Putzke JD.Deen HG, et al.Spine J. 2006 Sep-Oct;6(5):494-9. doi: 10.1016/j.spinee.2006.01.011. Epub 2006 Jul 24.Spine J. 2006.PMID: 16934717Clinical Trial.