الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
First of all, thanks and gratitude should be given where it is due, to ALLAH.
My deepest gratitude and sincerest appreciation to Professor Dr. Samia El-Sayed Bassiouny, Professor of Phoniatrics, Faculty of Medicine, Ain Shams University, for her continuous encouragement that helped me through every step in this work. Her support and advice has helped me to accomplish this work in the best possible way.
I feel greatly indebted to Professor Dr. Gamal Abd El-Hameed Abd El Maksoud, Professor of E.N.T, Faculty of Medicine, Zagazig University, for without his efforts this work would have never seen the light. I owe him a lot for the time she spent in revising every detail in this work.
I am grateful to Assistant Prof. Dr. Aml Mahmoud Saber, Assistant Professor of Phoniatrics, Faculty of medicine, Ain Shams University for her kind direction and valuable support throughout the accomplishment of this essay.
I would like to thank all my colleagues in the Unit of Phoniatrics, Ain Shams University and Zagazig University for their support.