1. Department of Cardiology, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea.
2. Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea.
4. Department of Radiology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
5. Cardiovascular Center, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
6. Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
7. Division of Cardiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.