1 From the Department of Neurology and German Center for Vertigo and Balance Disorders (M.S., C.F.) and Department of Neurosurgery (J.T.), Ludwig Maximilians University, Munich, Campus Grosshadern, Munich, Germany. Michael.Strupp@med.uni-muenchen.de.
2 From the Department of Neurology and German Center for Vertigo and Balance Disorders (M.S., C.F.) and Department of Neurosurgery (J.T.), Ludwig Maximilians University, Munich, Campus Grosshadern, Munich, Germany.