OPN1SW and acute lymphoblastic leukemia: For this, we screened three ETV6::RUNX1‐ BCP‐ALL cell lines (MHH‐CALL‐2, SUP‐B15, and RS4;11) and the ETV6::RUNX1+ cell line REH as well as two ETV6::RUNX1+ PDX samples (Figures 7F and S12).