Fig. 7From: Identification of a cytokine-dominated immunosuppressive class in squamous cell lung carcinoma with implications for immunotherapy resistanceIDO protein expression analysis in EIC. A, B Boxplots showing protein expression difference between the EIC and the rest class in late-stage and early-stage LUSC, respectively. Wilcoxon rank-sum test was utilized to perform comparision analysis. C The immunohistochemically stained tissue images show different expression levels of IDO protein across three LUSC patients from HPABack to article page