1. From the Stanford University School of Medicine, Stanford, Calif (M.A.H., D.B.B., K.A.M.); the University of Pittsburgh, Pa (M.M.B.); Duke University, Durham, NC (D.B.M.); the University of Michigan, Ann Arbor (B.P.); the Mayo Clinic, Rochester, Minn (G.S.R.); the University of Alabama at Birmingham (W.J.R.); the Boston University School of Medicine, Mass (T.J.R.); the Cleveland Clinic, Ohio (P.L.W.); and Saint Louis University, Mo (R.D.W.).