title: [Various methodological characteristics of the cluster method of study of morbidity].
mesh_terms: D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D006801:Humans; D007223:Infant; D009017:Morbidity; D009393:Nephritis / Q000453:epidemiology; D012494:Sampling Studies
vernacular_title: Nekotorye metodicheskie osobennosti gnezdovogo metoda izucheniia zabolevaemosti.