1. Department of Applied Medical Sciences, Unayzah Community College, Qassim University, Unayzah, Saudi Arabia
2. Research Center, King Fahad Medical City, Riyadh, Saudi Arabia
3. Department of Medical Laboratory, Blood Donor Unit, King Saud Hospital, Unayzah, Saudi Arabia
4. Gastroenterology & Department of Hepatology, King Fahad Medical City, Riyadh, Saudi Arabia
5. Transfusion Medicine & Department of Hematopathology, King Fahad Medical City, Riyadh, Saudi Arabia