Document Type : Original Article
Authors
1 Audio-Vestibular Medicine unit, Otorhinolaryngology department, Al-Ahrar teaching hospital, Zagazig , Egypt.
2 Audio-Vestibular Medical Unit, ENT department, Faculty of Medicine, Zagazig University, Sharkia, Egypt
3 Clinical pathology department, Faculty of medicine, Zagazig University, Egypt.
4 Audio-Vestibular Medicine unit, Otolaryngology Department, Faculty of Medicine, Zagazig University, Egypt.
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