1 Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA 2 Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA 3 Department of Neurology, Ghent University Hospital, Ghent, B.9000, Belgium 4 Department of Radiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA 5 Department of Neurology, Mayo Clinic Co...