1. From the Otolaryngology Department, King Saud University, Riyadh, Saudi Arabia
2. Correspondence: Dr. Khalid A. Al-Mazrou · ORL Department, King Saud University, PO Box 86118, Riyadh 11622, Saudi Arabia · T: +966-50-542-3843 F: +966-1-252-0051 · kalmazrou@gmail.com · Accepted for publication May 2009
3. From the Otolaryngology Department, King Abdulaziz Medical City, Riyadh, Saudi Arabia