Ioannis Vasileiadis1, Theodore Karatzas2. 1. Department of Otolaryngology/Head Neck Surgery, Brighton and Sussex University Hospitals NHS Trust, Brighton, Sussex, United Kingdom. Electronic address: j.vasileiadis@yahoo.gr. 2. Second Department of Propedeutic Surgery, Medical School, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece.