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Litvinov IV, St-Germain G, Pelletier R, Paradis M, Sheppard DC.Litvinov IV, et al. Among authors: st germain g.Epidemiol Infect. 2013 Jun;141(6):1143-7. doi: 10.1017/S0950268812001860. Epub 2012 Aug 29.Epidemiol Infect. 2013.PMID: 22929032Free PMC article.Review.