1. From the Divisions of Cardiology (K.K.K., D.K.J., W.C.K., S.H.H., I.S.C., E.K.S.), Clinical Pathology (J.Y.A.), Obstetrics and Gynecology (Samsung Medical Center, Sungkyunkwan University) (B.-K.Y.), Radiology (H.S.K.), and Preventive Medicine (Biostatistics) (D.S.K.), Gachon Medical School, Incheon, Korea.