Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleControlling confounding by frailty when estimating influenza vaccine effectiveness using predictors of dependency in activities of daily living.AuthorsZhang, Henry T.; McGrath, Leah J.; Wyss, Richard; Ellis, Alan R.; Stürmer, TilPublicationPharmacoepidemiology & Drug Safety, 2017, Vol 26, Issue 12, p1500ISSN1053-8569Publication typeArticleDOI10.1002/pds.4298