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Abstract
Mesh: See more » ChildChild WelfareChild, PreschoolDenmarkGlobal HealthHealth Services Research/organization & administrationHumansNetherlandsResearch Support as TopicSocial SciencesVaccination/statistics & numerical dataWorld Health Organization
Year: 1998 PMID: 9786041
Source DB: PubMed Journal: Wkly Epidemiol Rec ISSN: 0049-8114