In addition, from OncoLnc (www.oncolnc.org) website, it was found that the stomach adenocarcinoma (STAD) patients with high NUDT1 (MTH1) expression level exhibited a worse overall survival rate than those with low NUDT1 expression (Supplementary Fig. 2C), further indicating the possible negative correlation between MTH1 expression and the GC patients’ survival. The gene discussed is NUDT1; the disease is gastric adenocarcinoma.