1. Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea
2. Division of Cardiology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
3. Department of Nuclear Medicine and
4. Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Republic of Korea
5. Department of Nuclear Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Republic of Korea; and
6. Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea