Petros Koltsidopoulos1, Charalambos Skoulakis2. 1. Department of Otolaryngology (Koltsidopoulos), General Hospital of Volos "Achillopoulio," Volos, Greece; Department of Otolaryngology (Skoulakis), University Hospital of Larissa, Larissa, Greece petkoltsid@yahoo.gr. 2. Department of Otolaryngology (Koltsidopoulos), General Hospital of Volos "Achillopoulio," Volos, Greece; Department of Otolaryngology (Skoulakis), University Hospital of Larissa, Larissa, Greece.