Time to progression by 1.0 EDSS point between 10 patients with a pretransplantation extended disability status scale (EDSS) of 6.0 or less and 18 patients with a pretransplantation EDSS of more than 6.0. HSCT indicates hematopoietic stem cell transplantation. Y-axis is percent failing by at least 1-point increase in the EDSS.