Department of Tropical Medicine;
Faculty of Medicine;
Ain Shams University;
Cairo;
Egypt;
Department of Internal Medicine;
Faculty of Medicine;
Ain Shams University;
Cairo;
Egypt;
Department of Community;
Environmental and Occupational Medicine;
Faculty of Medicine;
Ain Shams University;
Cairo;
Egypt;
Department of Tropical Medicine;
Theodor Bilharz Research Institute;
Cairo;
Egypt;
Upper; Gastrointestinal; Bleeding; Rockall; Score; Portal; Hypertension;