1. Departments of Internal Medicine (I.L., V.E., J.L.L., A.L.P., K.M.W., B.A.-H., R.H.U., L.S.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390
2. Clinical Sciences (B.A.-H., S.Z.), University of Texas Southwestern Medical Center, Dallas, Texas 75390
3. Radiology (L.S.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390