1. Cardiovascular Division (T.M.M., D.S.F.), University of Pennsylvania, Philadelphia.
2. Evaluative Research (T.M.M., L.Y., P.W.G., D.S.F.), University of Pennsylvania, Philadelphia.
3. Thomas Jefferson University School of Medicine, Philadelphia, PA (E.F.).
4. Division of General Internal Medicine (P.W.G.), Perelman School of Medicine; and Center for Cardiovascular Outcomes, Quality,
5. Corporal Michael J. Crescenz VA Medical Center, Philadelphia, PA (P.W.G.).