1292Incidence of norovirus-associated acute gastroenteritis in four Veteran's Affairs Medical Center populations in the United States, 2011-2012. (December 2014) - Grytdal, Scott; Rimland, David; Shirley, S. Hannah; Rodriguez-Barradas, Maria C.; Goetz, Matthew Bidwell; Brown, Sheldon; Lucero-Obusan, Cynthia; Holodniy, Mark; Graber, Christopher; Parashar, Umesh D.; Vinje, Jan; Lopman, Benjamin a.