RT Journal Article SR Electronic(1) A1 Fock, R A1 Bergmann, H A1 Bußmann, H A1 Fell, G A1 Finke, E J A1 Koch, U A1 Niedrig, M A1 Peters, M A1 Riedmann, K A1 Scholz, D A1 Wirtz, A YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.07.01.00353-fr