1. Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan.
2. Cardiovascular Surgery (M.A., K.K., S. Kawamoto, Y.S.), Tohoku University Graduate School of Medicine, Sendai, Japan.