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The hospitalization rates for cumulative heart failure in elderly patients with chronic kidney disease in Taiwan (n = 4406) from January 1, 1999 to December 31, 2008, stratified according to the total number of vaccinations during (A) the influenza season (p < 0.001), (B) the noninfluenza season (p < 0.001), and (C) all seasons (p < 0.001).
