NQO1 and head and neck squamous cell carcinoma: The tumor mutation burden was positively correlated with the NQO1 expression levels in cholangiocarcinoma, pancreatic adenocarcinoma, thymoma, glioma, kidney renal papillary cell carcinoma, head and neck squamous cell carcinoma, and negatively correlated in glioblastoma multiforme, acute myeloid leukemia, and prostate adenocarcinoma (Figure 3A).