RT Journal Article SR Electronic(1) A1 de Greeff, S A1 Schellekens, J. F.P A1 Mooi, F A1 de Melker, H YR 2004 T1 Pertussis incidence in the Netherlands after introduction of an acellular booster vaccination at 4 years of age JF Weekly releases (1997–2007) VO 8 IS 27 SP 2496 OP DO https://doi.org/10.2807/esw.08.27.02496-en UL https://www.eurosurveillance.org/content/10.2807/esw.08.27.02496-en