RT Journal Article SR Electronic(1) A1 Lopman, B A A1 van Duynhoven, Y T H P A1 Hanon, F X A1 Reacher, M A1 Koopmans, M A1 Brown, D W YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.07.04.00323-es