1. ENT Department, King Abdulaziz University Hospital, King Saud University, PO Box 245, Riyadh 11411
2. Correspondence: Sami Alharethy, MD · Assitant Professor, King Saudi University, King Abdulaziz University Hospital · T: 966-1-4786100 F: 966-1-4775748 · harthi2000@hotmail.com