Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, and Neuroimmunology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892; Laboratory of Immunology, Institut de Recherches Cliniques de Montreal, Montreal, Quebec H2W 1R7, Canada; Department de Microbiologie et d’Immunologie, Universite de Montreal, Montreal, Quebec H3C 3J7, Canada; and Department of Microbiology and Immunology, McGill University,... (1997-09-02時点)