RT Journal Article SR Electronic(1) A1 Desenclos, J C YR 1999 T1 Surveillance is action! JF Eurosurveillance VO 4 IS 11 SP 111SP 58 OP 111 DO https://doi.org/10.2807/esm.04.11.00058-en UL https://www.eurosurveillance.org/content/10.2807/esm.04.11.00058-en