1. Chair, Otolaryngology Head and Neck Surgery Cleveland Clinic Abu Dhabi, P.O. Box 112412, Abu Dhabi, UAE
2. Department of Otolaryngology Head and Neck Surgery, American University of Beirut Medical Center, P.O. Box 11-0236, Riad El Solh, Beirut 1107-2020, Lebanon
3. Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, P.O. Box 11-0236, Riad El Solh, Beirut 1107-2020, Lebanon