pcB- and T-ALL in AIEOP-BFM ALL 2000. Shown is the distribution of patients in the different MRD risk groups according to immunophenotype.^29,37  MRD-SR indicates no MRD detectable at days 33 and 78 from diagnosis, with a sensitivity for the 2 targets of at least 10⁻⁴; MRD-HR indicates that the MRD level at day 78 is ≥ 10⁻³; and MRD-IR indicates all other constellations of MRD.