title: [Prevalence and incidence of rheumatic fever in children in the City of Warsaw between 1970 and 1974].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000209:etiology; D011044:Poland; D012213:Rheumatic Fever / Q000150:complications / Q000453:epidemiology*
vernacular_title: Chorobowość i zachorowalność dzieci na goraczke reumatyczna na terenie Warszawy w latach 1970-1974