FAP and cancer: The FAP expression in non-cardiac tissues were documented in past studies 33 and “no or very low levels of FAP staining were detected except for organs with areas of remodeling tissue (proliferating endometrium, placenta).” Regarding the scalability of CAR-T production, since we are treating a relatively slow-progressing disease, the therapeutic dose of CAR-T cells is dramatically lower than that of CAR-T cells used to treat cancer.