RT Journal Article SR Electronic(1) A1 Bossi, P A1 Tegnell, A A1 Baka, A A1 van Loock, F A1 Hendriks, J A1 Werner, A A1 Maidhof, H A1 Gouvras, G YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.09.12.00504-fr