Document Type : Original Article
Authors
1 otorhinolaryngology,al-azhar university,faculty of medicine for girls,cairo
2 Department of Otolaryngology, Faculty of Medicine, Al-Azhar University, Egypt.
3 Department of Otolaryngology, Faculty of Medicine, Al-Azhar University, Egypt
4 Department of Phoniatrics, Faculty of Medicine, Al-Azhar University, Egypt.
Abstract
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