1. Division of Cardiology, Department of Medicine, University of Colorado, Aurora, CO (S.A.S., R.S.B., S.W.W., J.A.V.).
2. Rocky Mountain Regional VA Medical Center, Aurora, CO (A.H., S.W.W., J.A.V.).
3. CART Program, Office of Quality and Patient Safety, Veterans Health Administration, Washington, DC (M.E.P., S.W.W.).
4. Malcom Randall Veterans Affairs Medical Center, Gainesville, FL (K.E.P.).
5. Michigan Heart and Vascular Institute, Ann Arbor, MI (J.A.V.).