1. Department of Pharmacology, Faculty of Medicine, Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia
2. Department of Pharmacology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
3. Department of Medicine, Division of Gastroenterology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
4. Department of Hematology, Faculty of Applied Medical Sciences, King Abdulaziz University, King Abdulaziz University, Jeddah, Saudi Arabia
5. Department of Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia