Stephen G Waxman1, Orhun Kantarci2. 1. From the Department of Neurology and Center for Neuroscience & Regeneration Research (S.G.W.), Yale University School of Medicine, New Haven, CT; Rehabilitation Research Center (S.G.W.), Veterans Administration Connecticut Healthcare System, West Haven; and Department of Neurology (O.K.), Mayo Clinic College of Medicine, Rochester, MN. stephen.waxman@yale.edu. 2. From the Department of Neurology and Center for Neuroscience & Regeneration Research (S.G.W.), Yale University School of Medicine, New Haven, CT; Rehabilitation Research Center (S.G.W.), Veterans Administration Connecticut Healthcare System, West Haven; and Department of Neurology (O.K.), Mayo Clinic College of Medicine, Rochester, MN.