1. Donald W. Reynolds Cardiovascular Clinical Research Center, Departments of Internal Medicine (S.G.L., J.C.C., J.D.H., H.H.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-9046
2. Molecular Genetics (T.A.L., J.D.H., H.H.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-9046
3. The Howard Hughes Medical Institute (H.H.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390-9046