Peak values of NS7CAR T-cell expansion in subgroups of patients as determined by qPCR. The peak value of NS7CAR expansion was significantly associated with previous transplant history (P = .0289) (A) but not with the subgroups of the disease diagnosed (B) or the presence of EMD (C) (P > .05). Statistical significance could not be established due to the small sample size (n < 2) of the CRS grade subgroups (D) or for the doses of NS7CAR T cells infused (E).