1. From the Department of Cardiovascular Medicine, Kyoto Univ Graduate School of Medicine, Kyoto (T.K., M.N., H.S.); Center for General Internal Medicine an Emergency Care, Kinki University School of Medicine, Osaka (T.M.); Division of Cardiology, Hokkaido Social Insurance Hospital, Hokkaido (K.I.); Department of Cardiology, Kurashiki Central Hospital, Kurashiki (K. Kadota); Division of Cardiology, Mitsui Memorial Hospital, Tokyo (K.T.); Division of Cardiology, Tokai University Hospital, Kanagawa (Y.M....