1. University of Belgrade Faculty of Medicine, Belgrade, Serbia
2. Institute for Cardiovascular Diseases “Dedinje”, Belgrade, Serbia
3. Cedars-Sinai Sinus Center of Excellence, Cedars-Sinai Medical Center, Los Angeles, CA, USA
4. Division of Otolaryngology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
5. Shohet Ear Associates Medical Group, Inc., Orange County, CA, USA