1. “Carol Davila” University of Medicine and Pharmacy, General Medicine, 050474 Bucharest, Romania
2. ENT Institute of Phonoaudiology and Functional Surgery “Prof. Dr. D. Hociota”, 050751 Bucharest, Romania
3. Bucharest Emergency University Hospital, 050098 Bucharest, Romania
4. “Grigore Alexandrescu” Emergency Children Hospital, 011732 Bucharest, Romania