title: [Socio-hygienic study of the health status of frequently ill preschool children].
authors.forename: I I
authors.initials: II
authors.lastname: Purtov
mesh_terms: D002662:Child Health Services / Q000458:organization & administration; D002675:Child, Preschool; D006262:Health; D006304:Health Status; D006801:Humans; D009017:Morbidity; D012426:Russia; D012959:Socioeconomic Factors
vernacular_title: Sotsial'no-gigienicheskie issledovanie sostoianiia zdorov'ia chasto boleiushchikh deteĭ doshkol'nogo vozrasta.