1. University Hospital Sveti Duh Department of Otorhinolaryngology, Head and Neck Surgery, , Zagreb, Croatia
2. Josip Juraj Strossmayer University of Osijek Faculty of Dental Medicine and Health Osijek, , Osijek, Croatia
3. University Hospital Dubrava Department of Maxillofacial Surgery, , Zagreb, Croatia
4. University of Zagreb , School of Medicine, Zagreb, Croatia