1. 1st Otolaryngology Department, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, AHEPA Hospital, 1, Stilponos Kyriakidi St., 546 36 Thessaloniki, Greece
2. Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, AHEPA Hospital, 1, Stilponos Kyriakidi St., 546 36 Thessaloniki, Greece