title: [ON THE EPIDEMIOLOGY OF CHRONIC DISEASES AND VARIOUS METHODS OF EPIDEMIOLOGICAL STUDY].
mesh_terms: D002908:Chronic Disease; D016021:Epidemiologic Studies; D004813:Epidemiology; D006801:Humans
keywords: CHRONIC DISEASE; EPIDEMIOLOGY
vernacular_title: O EPIDEMIOLOGII CHOR'OB PRZEWLEKLYCH I NIEKT'ORYCH METODACH BADA'N EPIDEMIOLOGICZNYCH.