Our group has developed a panel of GNS cells from patient samples and characterised them for FAP expression21 and we used these GNS cells, together with those from the Q‐Cell resource38 as in vitro models to investigate more authentically how our CAR‐T cells tackle the heterogeneity of glioblastoma, including low and heterogeneous patterns of FAP expression. This evidence concerns the gene FAP and glioblastoma.