1. Department of Radiology, Seoul National University Hospital, Seoul, Korea.
2. Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.
3. Division of Cardiology, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Korea.
4. Department of Cardiology and Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea.
5. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
6. Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea.
7. Institute on Aging, Seoul National University, Seoul, Korea.
8. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea.