[Causes of deafness 20 years ago and today].
D002648:Child; D003604:Czechoslovakia; D003638:Deafness / Q000151:congenital / Q000209:etiology* / Q000266:history; D049673:History, 20th Century; D006801:Humans; D008581:Meningitis / Q000150:complications; D012189:Retrospective Studies; D012572:School Health Services
Príciny hluchoty pred 20 lety a dnes.