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Grad YH, Lipsitch M, Aiello AE.Grad YH, et al. Among authors: lipsitch m.Am J Epidemiol. 2012 Jan 1;175(1):54-9. doi: 10.1093/aje/kwr288. Epub 2011 Nov 15.Am J Epidemiol. 2012.PMID: 22085628Free PMC article.
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