NUDT1 and hepatocellular carcinoma: A more extended clinical database analysis of NUDT1 expression across HCC samples was performed by Ou et al. For this purpose, on top of the HCC cases from TCGA database, they used datasets generated by independent research projects available in the Gene Expression Omnibus database: GSE14323 (HCC samples = 55, controls = 60), GSE14520 (HCC samples = 225, controls = 220), GSE41804 (HCC samples = 20, controls = 20), GSE45436 (HCC samples = 93, controls = 41), GSE51401 (HCC samples = 30, controls = 34), GSE62232 (HCC samples = 81, controls = 10), GSE6764 (HCC samples = 35, controls = 40).