1. Cardiology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt
2. Cardio-Thoracic Department, Electrophysiology and Electrostimulation Laboratory, University of Brescia, Spedali Civili di Brescia, Brescia, Italy
3. Department of Cardiovascular Medicine, Assiut University Heart Hospital, Assiut University, Assiut, Egypt
4. GVM Care and Research, Maria Eleonora Hospital, Palermo, Italy