FGFR4 and neoplasm: To gain insight into the molecular underpinnings of the superior antitumor effect exhibited by FGFR4.28HTM.28z-CD276.8HTM.BBz BiCisCAR T-cells, we performed Cellular Indexing of Transcriptomes and Epitopes by sequencing (CITE-Seq) using 14 protein markers (Supplementary Table 1) on tumor-infiltrating T-cells (TIL) isolated from JR tumor-bearing mice 11 days after CAR T-cells treatment.