1. Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.
2. Neuroimmunology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD 20892, USA.
3. Division of Neuropathology, Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
4. Department of Molecular Biotechnology, University of Washington School of Medicine, Seattle, WA 98195, USA.