Data from a TCGA’s data set (449 stomach adenocarcinoma (STAD) samples, Figure 5) provided by the UALCAN web resource for analyzing cancer OMICS data (http://ualcan.path.uab.edu/index.html [24], accessed on 28 July 2021) indicate that there are no DUOX2 mRNA statistical differences between normal and primary tumors based on sample types, tumor grades, or nodal metastasis status. Here, DUOX2 is linked to cancer.