title: 29th ESPID Annual Meeting in The Hague, the Netherlands.
authors.affiliation: Department of Pediatrics, Division of Pediatric Infectious Diseases, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands. R.deGroot@cukz.umcn.nl
authors.forename: Ronald
authors.initials: R
authors.lastname: de Groot
authors.forename: Adilia
authors.initials: A
authors.lastname: Warris
mesh_terms: D003141:Communicable Diseases / Q000175:diagnosis* / Q000453:epidemiology*; D006801:Humans; D009426:Netherlands; D014611:Vaccination / Q000379:methods*