1. From the Cardiovascular Center (Y.T., A.T., T.K., T.F., K.O., S.K., A.F., S.M., T.N., H.H.), Yokosuka Kyousai Hospital, Yokosuka, Japan; and the Department of Cardiovascular Medicine (Y.T., A.Y., K.H., M.I.), Tokyo Medical and Dental University, Tokyo, Japan.