1. From the Integrative Neuroscience (N.W., M.L., S.C.P.), Dartmouth College, Hanover, NH; Neurology (N.W., K.D., S.C.P., A.D.S., A.R.P., F.G.), Dartmouth Hitchcock Medical Center, Lebanon, NH; and Veteran Affairs Medical Center (K.D.), White River Junction, VT.