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Abstract
Entities: Chemical
Mesh: See more » ChildChild, PreschoolDietary Supplements/standardsFemaleGuidelines as TopicHumansImmunization Programs/organization & administrationIncidenceInfantMaleRisk FactorsSwitzerland/epidemiologyVitamin A Deficiency/epidemiologyVitamin A Deficiency/prevention & controlWorld Health Organization
Year: 1999 PMID: 9930031
Source DB: PubMed Journal: Wkly Epidemiol Rec ISSN: 0049-8114