1. Division of Gastroenterology, Department of Internal Medicine, King Fahd Hospital of the University, Al-Khobar 31952, Saudi Arabia
2. College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
3. Division of Endocrine, Department of Internal Medicine, King Fahd Hospital of the University, Al-Khobar 31952, Saudi Arabia
4. Department of Internal Medicine, King Fahd Hospital of the University, Al-Khobar 31952, Saudi Arabia