STEPHEN L. HAUSER, M.D. is a Distinguished Professor of Neurology at the University of California, San Francisco, and Director of the Weill Institute for Neurosciences. His research as a physician-scientist has led to a powerful new approach to the treatment of multiple sclerosis, a disabling neurologic disease. His work has received numerous honors, such as the Jacob Javits Neuroscience Investigator Award, the John Dystel Prize, the Charcot Award, the Taubman Prize for Excellence in Translational Medical Research, and the Scientific Breakthrough Award from the American Brain Foundation.