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Abstract
Mesh: See more » HumansHungaryPostal Service/standardsPrimary Health Care/organization & administrationPrimary Health Care/standardsProgram EvaluationRefrigeration/standardsVaccines/standardsWorkforce
Substances: See more » Vaccines
Year: 1990 PMID: 2386701
Source DB: PubMed Journal: Wkly Epidemiol Rec ISSN: 0049-8114