1. Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan (Y.W., K.N., N.O., S.H., M.H., Y.O.).
2. Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine, Gunma, Japan (Y.K.).
3. Department of Cardiology (H.M., K.T., R.K.), Saitama Medical University International Medical Center, Saitama, Japan.
4. Department of Pediatric Cardiology (H.M., N.S.), Saitama Medical University International Medical Center, Saitama, Japan.
5. Department of Cardiology, Ayase Heart Hospital, Tokyo, Japan (M.M.).
6. Tokyo Rinkai Hospital, Tokyo, Japan (K.S.).