1. Department of Otorhinolaryngology–Head and Neck Surgery, University Hospitals Plymouth NHS Trust, Plymouth, United Kingdom
2. 1st Academic Department of Otorhinolaryngology–Head and Neck Surgery, AHEPA Hospital, Aristotle University of Thessaloniki, Greece
3. Department of Otorhinolaryngology–Head and Neck Surgery, “G. Papanikolaou” General Hospital, Thessaloniki, Greece
4. 2nd Academic Department of Otorhinolaryngology–Head and Neck Surgery, Papageorgiou Hospital, Aristotle University of Thessaloniki, Greece