RT Journal Article SR Electronic(1) A1 Beauté, J A1 Broberg, E A1 Plata, F A1 Bonmarin, I A1 O’Donnell, J A1 Delgado, C A1 Boddington, N A1 Snacken, R YR 2012 T1 Overrepresentation of influenza A(H1N1)pdm09 virus among severe influenza cases in the 2011/12 season in four European countries JF Eurosurveillance VO 17 IS 9 SP 20105 OP DO https://doi.org/10.2807/ese.17.09.20105-en UL https://www.eurosurveillance.org/content/10.2807/ese.17.09.20105-en