Jaffar Khan1, James L Bernat2. 1. From the Department of Neurology (J.K.), Emory University, Atlanta, GA; and Department of Neurology (J.L.B.), Dartmouth-Hitchcock Medical Center, Lebanon, NH. jkhan@emory.edu. 2. From the Department of Neurology (J.K.), Emory University, Atlanta, GA; and Department of Neurology (J.L.B.), Dartmouth-Hitchcock Medical Center, Lebanon, NH.