TY - JOUR A1 - Li, L. A1 - Wong, J.Y. A1 - Wu, P. A1 - Bond, H.S. A1 - Lau, E.H.Y. A1 - Sullivan, S.G. A1 - Cowling, B.J. T1 - Heterogeneity in estimates of the impact of influenza on population mortality: A systematic review Y1 - 2018 DO - 10.1093/aje/kwx270 VL - 187 IS - 2 ER -