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Forster SE, Jones L, Saxton JM, Flower DJ, Foulds G, Powers HJ, Parker SG, Pockley AG, Williams EA.Forster SE, et al. Among authors: saxton jm.BMC Med Res Methodol. 2010 Feb 22;10:17. doi: 10.1186/1471-2288-10-17.BMC Med Res Methodol. 2010.PMID: 20175903Free PMC article.