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Stewart MJ, Maher CG, Refshauge KM, Herbert RD, Bogduk N, Nicholas M.Stewart MJ, et al. Among authors: herbert rd.BMC Musculoskelet Disord. 2003 Aug 21;4:18. doi: 10.1186/1471-2474-4-18.BMC Musculoskelet Disord. 2003.PMID: 12932301Free PMC article.Clinical Trial.