Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Immunology, Mayo Clinic College of Medicine, Rochester, MN, USA

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Department of Neurology, Mayo Clinic College of Medicine, Scottsdale, AZ, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Ophthalmology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Ophthalmology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Departments of Neurology, Mayo Clinic College of Medicine, Rochester, MN, USA

Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA

Eoin P. Flanagan Mayo Clinic College of Medicine Rochester, MN 55905, USA. [email protected]

*VR and MM are joint first authors.