1. Department of Adult Cardiac Surgery Prince Sultan Cardiac Centre Riyadh Saudi Arabia
2. Cardiothoracic Surgery Department Tanta University Tanta Egypt
3. Cardiac Sciences Department, College of Medicine, King Fahad Cardiac Centre, King Saud University Medical City King Saud University Riyadh Saudi Arabia
4. Cardiothoracic Surgery Department Shbeen Elkom Teaching Hospital Shbeen Elkom Egypt
5. Cardiac Research Department Prince Sultan Cardiac Center Riyadh Saudi Arabia
6. Cardiac Surgery Department Johns Hopkins Aramco Hospital Dhahran Saudi Arabia