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Chen I, Goodman B 3rd, Galicia-Castillo M, Quidgley-Nevares A, Krebs M, Gliva-McConvey G.Chen I, et al.J Pain. 2007 Feb;8(2):152-60. doi: 10.1016/j.jpain.2006.06.008. Epub 2006 Sep 1.J Pain. 2007.PMID: 16949879Free article.