Differences in national influenza vaccination policies across the European Union, Norway and Iceland 2008-2009 Mereckiene, J and Cotter, S and D'Ancona, F and Giambi, C and Nicoll, A and Lévy-Bruhl, D and Lopalco, P L and Weber, J T and Johansen, K and Dematte, L and Salmaso, S and Stefanoff, P and Greco, D and Dorleans, F and Polkowska, A and O’Flanagan, D and on behalf of the VENICE project gatekeepers group, Eurosurveillance, 15, 19700 (2010), https://doi.org/10.2807/ese.15.44.19700-en