MIR31HG and pancreatic ductal adenocarcinoma: While lnc MIR31HG can act as a sponge to bind miR‐193b, miR‐193b can also directly target two binding sites on lnc MIR31HG, negatively regulates lnc MIR31HG levels, induces apoptosis and G1/the S phase arrest, and reduces the cell growth of pancreatic ductal adenocarcinoma.