1. Faculty of Medicine, King Fahad Medical City, Central Second Health Cluster, Ministry of Health, Riyadh, KSA
2. Research Center, King Fahad Medical City, Central Second Health Cluster, Ministry of Health, Riyadh, KSA
3. Faculty of Dentistry, UBC, Vancouver, Canada
4. College of Medicine, Prince Sattam Bin Abdulaziz University, AlKharj, KSA
5. Faculty of Medicine, Dar Al Uloom University, Riyadh, KSA
6. Department of Internal Medicine, King Faisal Medical Complex-Taif, Taif, KSA
7. College of Medicine, Al Faisal University, Riyadh, KSA