1. Department of Cardiac Sciences, College of Medicine, King Khalid University Hospital, Riyadh, Saudi Arabia
2. Department of Medicine, College of Medicine, King Khalid University Hospital, Riyadh, Saudi Arabia
3. Department of Medicine, Security Forces Hospital, Riyadh, Saudi Arabia
4. Saud AlBabtain Cardiac Center, Dammam, Saudi Arabia
5. King Faisal Specialist Hospital and Research Center, Jeddah, Saudi Arabia
6. King Fahd Armed Forces Hospital, Jeddah, Saudi Arabia
7. King Abdulaziz Medical City, Cardiac Center, National Guard, Riyadh, Saudi Arabia
8. Prince Salman Heart Center, King Fahd Medical City, Riyadh, Saudi Arabia