1. 1 Heart Centre, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
2. 2 Department of Cardiology and Sport Medicine, San Antonio Hospital, San Daniele del Friuli, Udine, Italy
3. 3 School of Medicine, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
4. 4 Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
5. 5 Department of Medicine, College of Medicine, Taibah University, Medina, Saudi Arabia