1. Division of Cardiology (C.E.K., L.A.A.), University of Colorado School of Medicine, Aurora.
2. Adult and Child Consortium for Outcomes Research and Delivery Science (C.E.K., L.A.A., D.D.M.), University of Colorado School of Medicine, Aurora.
3. Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Beth Israel Deaconess Medical Center, Boston, MA (D.B.K.).
4. Division of Geriatric Medicine, Department of Medicine (D.D.M.), University of Colorado School of Medicine, Aurora.
5. VA Eastern Colorado Geriatric Research Education and Clinical Center, Denver, CO (D.D.M.).