Eduardo E. Benarroch Consultant, Department of Neurology, Mayo Clinic, Rochester, Minnesota; Professor of Neurology, Mayo Clinic College of Medicine and Science Jeremy K. Cutsforth-Gregory Senior Associate Consultant, Department of Neurology, Mayo Clinic, Rochester, Minnesota; Assistant Professor of Neurology, Mayo Clinic College of Medicine and Science Kelly D. Flemming Consultant, Department of Neurology, Mayo Clinic, Rochester, Minnesota; Associate Professor of Neurology, Mayo Clinic College of Medicine and Science