1. From the Division of Cardiovascular and Respiratory Medicine, Department of Internal Medicine (T.Y., S.K., M.O., M.N., T.H., N.I., K.H., M.Y.), and the Department of Radiology (K.S.), Kobe University Graduate School of Medicine, Kobe, Japan, and the Japan Synchrotron Radiation Research Institute, Harima, Japan (K.U.).