Estimated efficacy versus risks of approved and experimental therapies for MS. The plot indicates estimated, approximate risks vs. efficacy measures for some approved and experimental MS treatments. Estimated risks of life threatening unwanted effects are obtained from data available in the current literature.39–50 The percent relapse suppression observed in treated patients is presented as a surrogate of efficacy. The list of treatments is not meant to be exhaustive but to only include the agents that have immediate relevance for the HSCT trial design. Abbreviations: GA, glatiramer acetate; IFN-β, interferon beta; FTY, fingolimod; Mitox., mitoxantrone; CY, cyclophosphamide, Nataliz., natalizumab; Alemt., alemtuzumab, Hi-CY, high-dose cyclophosphamide, HSCT, autologous hematopoietic stem cell transplantation.