Comparison of the outcomes of individuals with medically attended influenza A and B virus infections enrolled in 2 international cohort studies over a 6-year period: 2009-2015 by Dwyer, DE, Lynfield, R, Losso, MH, Davey, RT, Cozzi-Lepri, A, Wentworth, D, Uyeki, TM, Gordin, F, Angus, B, Qvist, T, Emery, S, Lundgren, J, Neaton, JD