1. Department of Cardiology, Busan St Mary's Medical Center, Busan, Korea.
2. Department of Cardiology, Pusan National University College of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.
3. Department of Diagnostic Radiology, Pusan National University College of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.
4. Department of Thoracic and Cardiovascular Surgery, Pusan National University College of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.