1. Children Health Ireland at Crumlin Dublin Ireland
2. Prince Sultan Cardiac Center Riyadh Kingdom of Saudi Arabia
3. The Lillie Frank Abercrombie Section of Cardiology, Department of Pediatrics Texas Children's Hospital, Baylor College of Medicine Houston Texas USA
4. Department of Pediatric Cardiology Department Faculty of Medicine Zagazig University Zagazig Egypt
5. Department of Pediatric Cardiology Department Cincinnati Children's Hospital University of Cincinnati College of Medicine Cincinnati Ohio USA
6. Department of Cardothoracic Surgery Tanta University Tanta Egypt
7. Heart Institute, UPMC Children's Hospital of Pittsburgh and Department of Pediatrics University of Pittsburgh School of Medicine Pittsburgh Pennsylvania USA