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Lipsitch, Marc, Lajous, Martin, O'Hagan, Justin J., Cohen, Ted, Miller, Joel C., Goldstein, Edward, Danon, Leon, Wallinga, Jacco, Riley, Steven, Dowell, Scott F., Reed, Carrie and McCarron, Meg. (2009) Use of cumulative incidence of novel influenza A/H1N1 in foreign travelers to estimate lower bounds on cumulative incidence in Mexico. PL o S One, Vol.4 (No.9). ISSN 1932-6203