1. Department of Hematology, Internal Medicine, King Fahad University Hospital, Al Khobar, Saudi Arabia
2. Department of Rheumatology, Internal Medicine, King Fahad University Hospital, Al Khobar, Saudi Arabia
3. Department of Internal Medicine, King Fahad University Hospital, Al Khobar, Saudi Arabia
4. College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia