1. Division of Cardiology, Department of Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine
2. Department of Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine
3. Department of Emergency Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine
4. Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine