FGFR4 and neoplasm: In contrast, both FGFR4.28HTM.BBz-CD276.8HTM.BBz and FGFR4.28HTM.28z-CD276.8HTM.BBz BiCisCARs completely eradicated tumors in all mice, and the latter showed a more rapid tumor elimination (Supplementary Fig. 7B–F).