Probability of survival from first relapse. (A) OS in years from date of first relapse based on sex. (B) Survival postrelapse stratified according to therapy given in relapse. Patients who died within 100 days of relapse and those who were transplanted in CR1 were excluded from this analysis for better comparison of the different therapeutic modalities. MUD indicates matched unrelated donor. Used with permission from Fielding et al.¹⁹