1. Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115
2. Department of Neuroimmunology, Max-Planck Institute for Neuroimmunology, 82152 Martinsried, Germany
3. Department of Medicine and Therapeutics, Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, United Kingdom
4. Laboratory Service, Veterans Affairs Health Care System, Palo Alto, CA 94304
5. Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305