Volume 12-Issue 4-2005 Effect of Splenectomy on Risk of Infection and other Complications among Sickle Cell Disease patients in Al-Ahsa Area -A retrospective cohort study Effect of use of Face mask on Hajj related Acute Respiratory Infection among Hajjis from Riyadh - A Health Promotion Intervention study Tinia capitis outbreak among school students, Al Hayt, Hail, 1426 H