RT Journal Article SR Electronic(1) A1 Jensen, C A1 Ethelberg, S A1 Gervelmeyer, A A1 Nielsen, E M A1 Olsen, K EP A1 Mølbak, K YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.11.02.00597-fr