1. ENT Clinic Papanikolaou Hospital Thessaloniki Greece
2. Division of General Anaesthesiology, Emergency‐ and Intensive Care Medicine Medical University of Graz Graz Austria
3. ENT Clinic University Hospital of Larissa Larissa Greece
4. Αpplied Informatics University of Macedonia Thessaloniki Greece
5. Medical School of Aristotle University of Thessaloniki Thessaloniki Greece
6. Department of Otorhinolaryngology University Medical Centre Mainz Mainz Germany