1. From the Departments of Cardiology (K.K.K., M.-S.S., D.K.J., S.H.H., W.-J.C., E.K.S.), Clinical Pathology (J.Y.A.), and Cardiovascular Medicine (I.S.), Hokkaido University Graduate School of Medicine, Sapporo, Japan; and the Departments of Radiology (H.S.K.) and Preventive Medicine (Biostatistics) (D.S.K.), Gachon Medical School, Incheon, Korea.