RT Journal Article SR Electronic(1) A1 Leung, Vivian K A1 Cowling, Benjamin J A1 Feng, Shuo A1 Sullivan, Sheena G YR 2016 T1 Concordance of interim and final estimates of influenza vaccine effectiveness: a systematic review JF Eurosurveillance VO 21 IS 16 SP 30202 OP DO https://doi.org/10.2807/1560-7917.ES.2016.21.16.30202 UL https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2016.21.16.30202