1. From the Department of Neurology (J.L.D.), Yale School of Medicine, New Haven, CT
2. Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (J.L.D.)
3. Department of Internal Medicine (C.M.V., L.H.Y., W.N.K.), Yale School of Medicine, New Haven, CT
4. Department of Neurology, Maine Medical Center, Portland, ME (M.J.G.)
5. Department of Neurology, Rhode Island Hospital, Alpert Medical School of Brown University, Providence (K.L.F.).