Substantial increase in listeriosis, Denmark 2009 Kvistholm Jensen, A and Ethelberg, S and Smith, B and Møller Nielsen, E and Larsson, J and Mølbak, K and Christensen, J J and Kemp, M, Eurosurveillance, 15, 19522 (2010), https://doi.org/10.2807/ese.15.12.19522-en