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Grimmer K, Dizon JM, Milanese S, King E, Beaton K, Thorpe O, Lizarondo L, Luker J, Machotka Z, Kumar S.Grimmer K, et al. Among authors: kumar s.BMC Med Res Methodol. 2014 May 10;14:63. doi: 10.1186/1471-2288-14-63.BMC Med Res Methodol. 2014.PMID: 24885893Free PMC article.
Katrak P, Bialocerkowski AE, Massy-Westropp N, Kumar S, Grimmer KA.Katrak P, et al. Among authors: kumar s.BMC Med Res Methodol. 2004 Sep 16;4:22. doi: 10.1186/1471-2288-4-22.BMC Med Res Methodol. 2004.PMID: 15369598Free PMC article.Review.