1. Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine
2. Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine
3. Department of Pediatrics, University of Ulsan College of Medicine
4. Department of Pediatrics, Sejong General Hospital
5. Departments of Pediatrics, Hanyang University College of Medicine
6. Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine
7. Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine
8. Division of Cardiology, Sejong General Hospital
9. Department of Pediatrics, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine