As shown in Table 1, the ABCB1-overexpressing multidrug-resistant KB-V-1 human epidermal cancer cells, NCI-ADR-RES human ovarian cancer cells, ABCB1-transfected MDR19-HEK293 cells, and the corresponding drug-sensitive parental KB-3-1, OVCAR-8, and pcDNA-HEK293 cells are equally sensitive to erdafitinib treatment. The gene discussed is ABCB1; the disease is ovarian carcinoma.