RT Journal Article SR Electronic(1) A1 Guérin, P J A1 Nygård, K A1 Siitonen, A A1 Vold, L A1 Kuusi, M A1 de Jong, B A1 Rottingen, J A A1 Alvseike, O A1 Olsson, A A1 Lassen, J A1 Andersson, Y A1 Aavitsland, P YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.11.02.00599-es