1. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (A.A., M.T.C., Y.K., R.G., C.S.R., A.P., J.D.S., L.O.L., A.L.).
2. Department of Internal Medicine, Saint Louis University School of Medicine, MO (A.A.).
3. Division of Cardiology, Department of Medicine, University of Arizona College of Medicine, Tucson (M.T.C.).
4. Economic Evaluation Unit, Kern Center for the Science of Healthcare Delivery, Mayo Clinic, Rochester, MN (J.P.M., J.K.R., B.B.).
5. Division of Cardiology, National Defense Medical College, Tokorozawa, Saitama, Japan (T.T.).
6. Philips Medical Systems, Eindhoven, the Netherlands (I.t.H.).
7. Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN (L.O.L.).
8. Division of Health Care Delivery Research, Mayo Clinic, Rochester, MN (B.B.).