%0 Journal Article %A van der Hoek, W %A Dijkstra, F %A de Lange, M M %A Donker, G A %A Meijer, A %A van der Sande, M A %T Letter to the editor: Influenza vaccine effectiveness: heterogeneity in estimates for the 2012/13 season %D 2013 %J Eurosurveillance %V 18 %N 7 %P 20399 %R doi:https://doi.org/10.2807/ese.18.07.20399-en %K influenza %K vaccine effectiveness %U https://www.eurosurveillance.org/content/10.2807/ese.18.07.20399-en