Probability of survival according to therapy given in relapse. Those who died within 100 days of relapse and those patients who underwent prior transplantation in CR1 are excluded from this analysis to allow more appropriate comparison of high-dose therapy and HSCT with chemotherapy alone. Sib Allograft indicates allogeneic HSCT from fully matched sibling donor; and MUD allograft, allogeneic HSCT from unrelated donor.