Some of the genes with differences in mRNA levels in the whole group (FLJ14213, NOS1, TCP1, INADL, ALDH3A1, and ALDH3A2) have been previously identified as having altered expression in different pancreatic tumor tissues or cells, according to the Pancreatic Expression Database [20] and the Pancreatic Cancer Database (http://www.pancreaticcancerdatabase.org). Here, NOS1 is linked to pancreatic neoplasm.