1. Division of Cardiology, Department of Medicine, Heart Vascular Stroke Institute Imaging Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Duke Cardiovascular Magnetic Resonance Center, Durham, NC, USA.
3. Department of Medicine, Duke University Medical Center, Durham, NC, USA.
4. Department of Radiology, Duke University Medical Center, Durham, NC, USA.