His work specializes on immune mechanisms and multiple sclerosis ( MS ) .
Stephen L. Hauser is a professor of the Department of Neurology at the University of California , San Francisco ( UCSF ) .
Stephen L. Hauser 's work specializes on immune mechanisms and multiple sclerosis ( MS ) .
Stephen L. Hauser is a professor of the Department of Neurology at the University of California , San Francisco ( UCSF ) .