CD28 and neoplasm: We showed that this anti-CD147 antibody could not block the cytotoxicity of CD19-CD28-4-1BB-CAR-NK-92MI cells against CD19+ Daudi cell line (Supplementary Fig. 6), indicating that the anti-CD147 antibody (clone HIM6) did not affect other types of CAR-NK cells (e.g., CD19-CD28-4-1BB-CAR cells), but specifically competed with CD147-CAR to recognize the target tumor antigen.