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Campbell KR, Juarez-Colunga E, Grunwald GK, Cooper J, Davis S, Gralla J.Campbell KR, et al.BMC Med Res Methodol. 2019 Jun 26;19(1):130. doi: 10.1186/s12874-019-0773-1.BMC Med Res Methodol. 2019.PMID: 31242848Free PMC article.
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