RT Journal Article SR Electronic(1) A1 Harder, K M A1 Andersen, P H A1 Bæhr, I A1 Nielsen, L P A1 Ethelberg, S A1 Glismann, S A1 Mølbak, K YR 2011 T1 Electronic real-time surveillance for influenza-like illness: experience from the 2009 influenza A(H1N1) pandemic in Denmark JF Eurosurveillance VO 16 IS 3 SP 19767 OP DO https://doi.org/10.2807/ese.16.03.19767-en UL https://www.eurosurveillance.org/content/10.2807/ese.16.03.19767-en