1. Department of Medical Education, College of Medicine, King Saud University, Riyadh, Saudi Arabia;
2. Department of Pathology and Medical Education, Suez Canal University, Ismailia, Egypt;
3. Department of Internal Medicine, Prince Mohammad Bin Abdulaziz Hospital, Riyadh, Saudi Arabia;
4. Department of Obstetrics and Gynecology, National Guard hospital, Riyadh, Saudi Arabia;
5. Department of Family Medicine, King Saud University Medical City, Riyadh, Saudi Arabia;
6. Department of Neurology, Imperial College School of Medicine, London, UK