1. From the Department of Neurology (C.C.L., C.E.H., L.B.D.L., B.C.C.), University of Michigan, Ann Arbor; Department of Neurology (C.C.L., K.A.K., J.F.B.), the Ohio State University, Columbus; Department of Neurology (L.E.S.), Northwestern University, Chicago, IL; Department of Neurology (G.J.E.), Emory University, Atlanta, GA; and Department of Neurology (A.H.), Yale University, New Haven, CT.