1. From the Department of Public Health Sciences (D.T.C., B.B.W.), the Department of Psychiatric Medicine (D.T.C.), the Department of Neurology (B.B.W.), and the University of Virginia Center for Biomedical Ethics (D.T.C.), University of Virginia, Charlottesville, Va; the Department of Public Health Sciences (L.D.C.), Wake Forest University, Winston-Salem, NC; the Department of Neurology (T.G.B., J.F.M.), Mayo Clinic, Jacksonville, Fla; the Department of Neurology (R.D.B.), Mayo Clinic, Rochester,...