RT Journal Article SR Electronic(1) A1 Bork, K H A1 Klein, B M A1 Mølbak, K A1 Trautner, S A1 Pedersen, U B A1 Heegaard, E YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.11.12.00669-fr