1. Division of Cardiovascular Disease (V.P, G.A., P.A.), University of Alabama at Birmingham.
2. Department of Medicine (N.P.), University of Alabama at Birmingham.
3. Cardiovascular Division, University of Minnesota, Minneapolis (R.K.).
4. Cardiology Division, Massachusetts General Hospital, Baim Institute for Clinical Research, Boston (J.L.J.).
5. Duke Clinical Research Institute, Durham, NC (G.M.F.).
6. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas (T.J.W.).
7. Section of Cardiology, Birmingham Veterans Affairs Medical Center, AL (P.A.).