1. Department of ENT, ‘Carol Davila’ University of Medicine and Pharmacy, 050474 Bucharest, Romania
2. Allergy Department, ‘Carol Davila’ University of Medicine and Pharmacy, 050474 Bucharest, Romania
3. Department of ENT, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
4. Department of ENT, ‘Grigore T. Popa’ University of Medicine and Pharmacy, 700115 Iasi, Romania