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Nicholas MK, Linton SJ, Watson PJ, Main CJ; "Decade of the Flags" Working Group.Nicholas MK, et al. Among authors: linton sj.Phys Ther. 2011 May;91(5):737-53. doi: 10.2522/ptj.20100224. Epub 2011 Mar 30.Phys Ther. 2011.PMID: 21451099Review.