1. Department of Laboratory Medicine and Pathology Mayo Clinic Rochester MN
2. Department of Neurology Mayo Clinic Rochester MN
3. Institute for Experimental Immunology affiliated to EUROIMMUN Medizinische Labordiagnostika Lubeck Germany
4. Department of Neurology Washington University St. Louis MO
5. Department of Neurology University of Iowa Iowa City Iowa
6. Overlake Neurosciences Institute Overlake Hospital Bellevue WA
7. Department of Neurology Mayo Clinic Jacksonville Florida
8. Department of Ophthalmology Palo Alto Medical Foundation Palo Alto CA
9. Department of Neurology Michigan State University Lansing MI
10. Weill Institute for Neurosciences, Department of Neurology University of California San Francisco CA