The neuroblastoma cell line NGP demonstrated moderate ALK surface expression (ALK WT, MYCN non-amplified; geometric mean 8.6x IgG control) and there was minimal detection of expression in the NGP ALK KO cell line (geometric mean 1.6x IgG control; Fig. 3A, Supplemental Table 5). The gene discussed is ALK; the disease is neuroblastoma.