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Riley RD, Abrams KR, Sutton AJ, Lambert PC, Thompson JR.Riley RD, et al.BMC Med Res Methodol. 2007 Jan 12;7:3. doi: 10.1186/1471-2288-7-3.BMC Med Res Methodol. 2007.PMID: 17222330Free PMC article.
Jackson D, White IR, Riley RD.Jackson D, et al. Among authors: riley rd.Stat Med. 2012 Dec 20;31(29):3805-20. doi: 10.1002/sim.5453. Epub 2012 Jul 4.Stat Med. 2012.PMID: 22763950Free PMC article.