To determine if there are variables linked to responsiveness to pulse cyclophosphamide/methylprednisolone therapy in progressive Multiple Sclerosis (MS).
Treatment of progressive multiple sclerosis with pulse cyclophosphamide/methylprednisolone: response to therapy is linked to the duration of progressive disease.
Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, 77 Avenue Louis Pasteur, HIM 730, Boston, Massachusetts, MA 02115-5817, USA.