1. Family & Community Medicine Department, King Khalid University, College of Medicine Abha, Abha, Saudi Arabia
2. Abha Children Hospital, Aseer Central Hospital, Head of Airway/Laryngology Unit – Aseer, Central Hospital, Abha, Saudi Arabia
3. Otorhinolaryngology, Head and Neck Surgery, Armed Forced Hospital Southern Region, Khamis Mushait, Saudi Arabia
4. Family Medicine, Abha, Saudi Arabia
5. Medical Intern, King Khalid University, Abha, Saudi Arabia
6. King Khalid University, Abha, Saudi Arabia
7. Tropical Health Department, High Institute of Public Health, Alexandria University, Alexandria, Egypt.