1. Heart Hospital, Hamad Medical Corporation Pharmacy Department, , Doha , Qatar
2. Department of Cardiology Department of Cardiology, , Kettering General Hospital, Kettering, Northants, NN16 8UZ, England
3. Bridgeport Hospital Department of Internal Medicine, , Yale New Haven Health, Bridgeport, Connecticut 06610 , United States
4. Cardiac Center , King Fahd Armed Forces Hospital , Jeddah 21159 , Saudi Arabia