1. Clinical Center of Serbia, Clinic for Otorhinolaryngology and Maxillofacial Surgery, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia
2. Primary Heathcare Center “Dr Simo Milošević”, Belgrade, Serbia
3. University of Belgrade, Faculty of Philosophy, Laboratory for Experimental Psychology, Belgrade, Serbia
4. University of Belgrade, Faculty of Medicine, Department of Pharmacology, Clinical Pharmacology
5. Clinical Center of Serbia, Clinic for Otorhinolaryngology and Maxillofacial Surgery, Belgrade, Serbia
6. Clinical Center of Serbia, Center for Radiology and Magnetic Resonance Imaging, Belgrade, Serbia
7. Clinical Center of Serbia, Clinic for Otorhinolaryngology and Maxillofacial Surgery, Belgrade, Serbia + Clinical Center of Serbia, Clinic for Physical Medicine and Rehabilitation, Belgrade, Serbia
8. Clinical Center of Serbia, Institute for Nuclear Medicine, Belgrade, Serbia