To recreate the tumor micronenvironment in vitro, murine CD4+ T cells were cultured in conditioned medium from wild-type (WT) or SDHB-deficient immortalized mouse chromaffin cells (imCC, clone 6 [CL6] and clone 8 [CL8]) (Kľučková et al., 2020). Here, SDHB is linked to neoplasm.