1. Department of Hematology, Faculty of Medicine King Abdulaziz University Jeddah Saudi Arabia
2. King Abdulaziz University Hospital Jeddah Saudi Arabia
3. Department of Internal Medicine, Faculty of Medicine King Abdulaziz University Jeddah Saudi Arabia
4. Department of Medical Education, Faculty of Medicine King Abdulaziz University Jeddah Saudi Arabia
5. Department of Medical Education, College of Medicine University of Illinois at Chicago Chicago Illinois USA
6. Harvard Medical School Boston Massachusetts USA