1. Division of Cardiovascular Diseases, Mayo Clinic Arizona, Scottsdale, AZ, USA.
2. Department of Cardiovascular Diseases, Prince Salman Heart Center, Riyadh, Saudi Arabia.
3. Section of Pediatric Cardiology, University of Calgary, Calgary, AB, Canada.
4. Division of Cardiovascular Diseases, University of Calgary, Calgary, AB, Canada.
5. Department of Radiology, King Fahad Medical City, Riyadh, Saudi Arabia.