NOS2 and neoplasm: Analysis of the pancreatic cancer cohorts in The Cancer Genome Atlas (TCGA) and Oncomine database (https://www.oncomine.org/resource/login.html) [Collision cohort [14]] also showed that a higher tumor NOS2 expression associates with poorer survival in patients with PDAC (Kaplan-Meier analysis, Log-rank test p = 0.041 and p = 0.022) (Supplementary Figure S1), which is consistent with the findings in our test cohort of 107 resected patients.