Centers of Excellence Colorado Neurological Institute Duke University, Neuroscience Center Institute for Neuroinformatics - Experimental Neurobiology, Germany Johns Hopkins University, Department of Neurology and Neurosurgery Massachusetts General Hospital, Brain Tumor Center and Neuro-Oncology Resources National Institute of Neurological Disorders and Stroke (NINDS), NIH New York University, Department of Neurology Partners Neurology, Massachusetts General Hospital and Brigham and Women's Hospital Singapore General Hospital, Department of Neurology Stanford University Stroke Center University of California at Los Angeles, Brain Research Institute University of California at Los Angeles, Department of Neurology University of California at San Diego, Muscle Physiology Laboratory University of California at San Francisco, Department of Neurology University of Chicago, The, Department of Neurology University of North Carolina, Department of Neurology University of Pennsylvania, Penn Neurological Institute University of Pittsburgh, Department of Neurology University of Western Ontario, London, Canada, Clinical Neurological Sciences University of Wisconsin, Department of Neurology Walton Centre for Neurology and Neurosurgery, The, U.K Washington University in St. Louis, The Internet Stroke CenterUpdated 09/24/03