Corresponding Author

Department of Neurology, Mayo Clinic, Rochester, Minnesota

Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota

Center MS and Autoimmune Neurology, Mayo Clinic, Rochester, Minnesota

Address correspondence to Sean Pittock, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. Telephone number: 507-284-2511; Fax number: 507-284-9114; E-mail: pittock.sean@mayo.edu