Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleBenefits of influenza vaccine in US elderly--appreciating issues of confounding bias and precision.AuthorsHak, Eelko; Hoes, Arno W; Nordin, Jim; Nichol, Kristin LPublicationInternational Journal of Epidemiology, 2006, Vol 35, Issue 3, p800ISSN0300-5771Publication typeletterDOI10.1093/ije/dyl068