1. Department of Otolaryngology, Head and Neck Surgery, Bnai Zion Medical Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel
2. Department of Community Medicine and Epidemiology, Bnai Zion Medical Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel
3. Evoked Potentials Laboratory, Bnai Zion Medical Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel