1. Division of Cardiology, Department of Medicine (L.R., C.Y., S.S.K.), Northwestern University, Chicago, IL.
2. Department of Preventative Medicine (M.M., L.R.P., T.-H.T.V., K.N.K., S.S.K.), Northwestern University, Chicago, IL.
3. Kaiser Permanente, Mid-Atlantic Permanente Research Institute, Rockville, MD (S.V.).
4. Division of General Internal Medicine and Geriatrics, Department of Medicine (J.F.), Northwestern University, Chicago, IL.