1. ENT Department, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
2. Pathology Department, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
3. Radiology Department, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
4. Molecular Biology and Histology Department, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
5. ENT Department, Faculty of Medicine, University of Oradea, 410073 Oradea, Romania
6. ENT Department, Grigore Popa University of Medicine and Pharmacy, 700115 Iasi, Romania