1. the Unit of Otolaryngology-Head & Neck Surgery, Hillel Yaffe Medical Center, Hadera and the Technion Faculty of Medicine, Haifa
2. Department of Otolaryngology-Head & Neck Surgery, Bnei Zion Medical Center, and the Technion Faculty of Medicine, Haifa
3. the Unit of Otoneurology, Lin and Carmel Medical Centers, Haifa, Israel.