Interrogating the control group alone (Supplemental Table 3), there was no significant difference in toxicities between patients who received G-CSF after CAR T (N = 42) and G-CSF non-exposed patients (N = 15), both for grade ≥2 CRS (21% vs. 13%, respectively, P = 0.71) and grade ≥2 ICANS (31% vs. 27%, respectively, P = 1.0). Here, CSF3 is linked to congenital rubella syndrome.