Document Type : Original Article
Authors
1 Phoniatrics Unit, Otolaryngology department, Sohag faculty of Medicine, Sohag unversity
2 Professor of Phoniatrics
3 Audiovestibular Unit, Otolaryngology Department, Sohag University Egypt
4 audiovestibular medicine unit in otolaryngology ,Sohag University Hospitals , Sohag , Egypt
Abstract
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