1. Department of Otorhinolaryngology, Military Medical Academy Faculty of Medicine, University of Defense, Belgrade, Serbia
2. Medigroup General Hospital, Belgrade, Serbia
3. Department of Pharmacokinetics and Clinical Pharmacy, Faculty of Pharmacy, University in Belgrade, Belgrade, Serbia
4. Clinical Center of Serbia, School of Medicine, University in Belgrade, Belgrade, Serbia
5. ENT Hospital “Dr. Zutic”, Belgrade, Serbia
6. Institute for Pharmacy, Military Medical Academy Faculty of Medicine, University of Defense, Belgrade, Serbia
7. Institute for Medical Research, Division of Clinical and Experimental Immunology, Military Medical Academy Faculty of Medicine, University of Defense, Belgrade, Serbia