The H-scores were higher for IDO2 (M = 188.3, SD = 66.9) and AhR (M = 200.4, SD = 39.0) compared to TDO2 (M = 96.5, SD = 52.8) and IDO1 (M = 42.9, SD = 40.3) in GBM samples (Fig. 2). Here, IDO1 is linked to glioblastoma.