Kaplan–Meier curves of relapse-free survival of the CAR-T cohort (left) and the HCT cohort (right) of 8 CAR-T patients and 12 HCT patients whose preceding relapse and second-line treatment data were both available. Kaplan–Meier curves of relapse-free survival of the CAR-T cohort (left) and the HCT cohort (right) of 8 CAR-T patients and 12 HCT patients whose preceding relapse and second-line treatment data were both available. Differences between the previous treatment responses (disease burden represented by the blue curves) were statistically tested using the log-rank test. CAR-T, chimeric antigen receptor T-cell; HCT, haematopoietic cell transplant. Duane Schulthess et al. BMJ EBM doi:10.1136/bmjebm-2019-111226 ©2019 by BMJ Publishing Group Ltd