title: [Outbreak of hepatitis A in a preschool--fresh seroprevalence data needed].
authors.affiliation: - , - .
authors.forename: Anders
authors.initials: A
authors.lastname: Widell
mesh_terms: D002656:Child Day Care Centers; D002675:Child, Preschool; D004641:Emigration and Immigration; D006506:Hepatitis A / Q000208:ethnology / Q000276:immunology / Q000635:transmission*; D006801:Humans; D013548:Sweden