1. Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan (Y.K., K. Fukuda, M.N., Y.H., K. Fukasawa, T.C., K.M., S.T., H.S.)
2. Department of Evidence-Based Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan (S.M., H.S.)
3. Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Sendai, Japan (H.O.)
4. Department of Pediatrics, Tohoku University Graduate School of Medicine, Sendai, Japan (M.K.)
5. Department of Cardiovascular Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan (O.A., Y.S.)