By PLZAK J   KALITOVA P   URBANOVA M   BETKA J   in British Journal of Radiology

ISSN:0007-1285|84|1007|e221-e223

British Institute of Radiology‎(2011)‎

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By Astl J.   Kuchynkova Z.   Taudy M.   Betka J.   in International Journal of Pediatric Otorhinolaryngology

ISSN:0165-5876|67|12|1375-1378

Elsevier‎(2003)‎

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