1. Department of Otorhinolaryngology and Head and Neck Surgery UHC Sestre milosrdnice Zagreb Croatia
2. School of Medicine University of Zagreb Zagreb Croatia
3. Department of Otorhinolaryngology and Head and Neck Surgery University Hospital Center Sestre Milosrdnice Zagreb Croatia
4. Department of Pathology University Hospital Center Sestre Milosrdnice Zagreb Croatia
5. Department of Ophthalmology University Hospital Center Zagreb Zagreb Croatia