1 Cardiology and Angiology Unit, Department of Clinical and Experimental Internal Medicine, Medical Research Institute, Alexandria University, Alexandria, Egypt.
2 Department of Cardiology, Alexandria University Faculty of Medicine, Alexandria, Egypt.
3 Department of Radiodiagnosis, Alexandria University Faculty of Medicine, Alexandria, Egypt.
4 Department of Cardiology, Houston Methodist Debakey Heart and Vascular Center, Houston, Texas, USA.
5 Department of Cardiology, Kasr ElAiny University Faculty of Medicine, Cairo, Egypt.
6 Department of Cardiology, Tanta University Faculty of Medicine, Tanta, Egypt.
7 Aswan Heart Centre (Magdi Yacoub Foundation), Aswan, Egypt.