Kaplan–Meier curve for relapse mortality in patients by Michelis et al.29 risk category. Favourable = first remission (CR1) of 6 months or more, age less than 55 years, and hematopoietic cell transplantation–specific comorbidity index (HCT-CI) score of 3 or less (n = 25); intermediate = CR1 of 6 months or more, age less than 55 years, and HCT-CI score greater than 3 (n = 20); poor = CR1 of less than 6 months or age 55 years or more (n = 10), or both.