1 From the Department of Neurology (A.G.), University Hospital Mannheim; University of Heidelberg (A.G.), Mannheim, Germany; and the Departments of Clinical Neurosciences and Surgery (F.E.C.), University of Calgary, Canada. achim.gass@medma.uni-heidelberg.de.
2 From the Department of Neurology (A.G.), University Hospital Mannheim; University of Heidelberg (A.G.), Mannheim, Germany; and the Departments of Clinical Neurosciences and Surgery (F.E.C.), University of Calgary, Canada.