1. Faculty of Medicine, Elrazi University, Khartoum, Sudan
2. Department of Medicine, King Hussein Medical Center, Amman, Jordan
3. Faculty of Medicine, Al-Azhar University, Cairo, Egypt
4. Faculty of Medicine, Hashemite University, Zarqa, Jordan
5. Faculty of Medicine, Fayoum University, Fayoum, Egypt
6. Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
7. Faculty of Medicine, Ain-Shams University, Cairo, Egypt
8. Department of Interventional Cardiology, Wayne State University School of Medicine, Detroit Medical Center, Detroit, MI, US