1. Medical Center of Special Telecommunications Service, 060044 Bucharest, Romania
2. ENT Department, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 030167 Bucharest, Romania
3. “Prof. Dr. Dorin Hociota” Institute of Phonoaudiology and Functional ENT Surgery, 21st Mihail Cioranu Street, 061344 Bucharest, Romania