EGFR and acute myeloid leukemia: To confirm that bystander killing was not unique to SW620 cells, a luciferase-expressing EGFR-negative acute myelogenous leukemia (AML) cell line, MOLM13-LUC (Table 1), was mixed with unlabeled EGFR-positive NUGC4 cells (1:1), T cells and EGFR BiTE®, and cytotoxicity was measured by luminescence.