1. Department of Cardiovascular Medicine (A.A., M.T.C., T.T., Z.I.A., P.A.N., F.L.-J., M.S.C., J.D.S., I.O., S.K., P.A.F., A.L.), Mayo Clinic, Rochester, MN.
2. Division of Cardiology, National Defense Medical College, Tokorozawa, Saitama, Japan (T.T.).
3. Division of Nephrology and Hypertension (L.O.L.), Mayo Clinic, Rochester, MN.