[Incidence of anemia in rural youths 11 to 13 years of age].
D000293:Adolescent; D000367:Age Factors; D000740:Anemia / Q000453:epidemiology*; D002648:Child; D005260:Female; D006452:Hemoglobinometry; D006801:Humans; D008297:Male; D011044:Poland; D012423:Rural Health; D012424:Rural Population; D012737:Sex Factors
Wystepowanie niedokrwistości wśród młodzieźy wiejskiej w wieku od 11 do 15 lat.