1 Department of Laboratory Medicine and Pathology and Department of Neurology, College of Medicine, Mayo Clinic, 200 First Street SW, Rochester MN 55905, USA; Department of Immunology, College of Medicine, Mayo Clinic, 200 First Street SW, Rochester MN 55905, USA. Electronic address: mckeon.andrew@mayo.edu.
2 Department of Immunology, College of Medicine, Mayo Clinic, 200 First Street SW, Rochester MN 55905, USA.