1. Department of Otorhinolaryngology, Čakovec County Hospital, 40000 Čakovec, Croatia
2. Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital Center Sestre Milosrdnice, 10000 Zagreb, Croatia
3. School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia
4. School of Medicine, University of Zagreb, 10000 Zagreb, Croatia