1. Faculty of Medicine, King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia
2. Faculty of Medicine, Princess Nora Bint Abdul Rahman University, Riyadh, Kingdom of Saudi Arabia
3. King Faisal Specialized Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
4. Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
5. Research Center, King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia