We performed an additional co-culture experiment using anti-FOLR1 CAR T cell candidates co-cultured with ovarian cancer cell lines with varying FOLR1 expression levels [36], i.e., OVCAR-3 (FOLR1low), SKOV-3 (FOLR1intermediate), and OV-90 (FOLR1high), as well as OV-90 FOLR1 KO cells (Supplementary Figure S4D). This evidence concerns the gene FOLR1 and ovarian cancer.