title: [The importance of prevalence studies in Czechoslovakia].
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003428:Cross Infection / Q000453:epidemiology*; D003604:Czechoslovakia; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged
vernacular_title: Význam prevalencních studií v CSR.