1. Department of Medicine, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
2. Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia
3. King Abdulaziz University Hospital, Riyadh, Saudi Arabia
4. College of Medicine, King Saud University, Riyadh, Saudi Arabia
5. Department of Emergency, King Khalid Hospital, Riyadh, Saudi Arabia
6. Department of Emergency, King Fahad Medical City, Riyadh, Saudi Arabia
7. Department of Otolaryngology-Head and Neck Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia