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Hirsh AT, George SZ, Bialosky JE, Robinson ME.Hirsh AT, et al. Among authors: george sz.J Pain. 2008 Sep;9(9):806-12. doi: 10.1016/j.jpain.2008.03.012. Epub 2008 May 16.J Pain. 2008.PMID: 18486557Free PMC article.Clinical Trial.