1. Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine
2. Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine
3. Department of Cardiology, Asan Medical Center, University of Ulsan College of Medicine
4. Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine