1. From theDepartment of Medicine, Dhari Alfayadh General Hospital, Baghdad, Iraq
2. Department of Medicine, Nishtar Medical University and Hospital, Multan, Pakistan
3. Department of Medicine, Faculty of Medicine, Alexandria University, Alexandria, Egypt
4. Department of Medicine, Faculty of Medicine, Fayoum University, Fayoum, Egypt
5. Department of Medicine, College of Medicine, University of Karbala, Iraq
6. Cardiology Department, University of Texas Medical Branch, Galveston, TX.