As for circ_0066147 (also known as hsa_circ_103390, we confirmed that they were the same molecule by using the blast tool of circBase online database with the sequence of hsa_circ_103390 probe from the Gene Expression Omnibus [GEO] database), generated by the backsplicing of scm-like with four mbt domains 1 (SFMBT1) mRNA, it had been shown to be significantly overexpressed in pancreatic ductal adenocarcinoma (PDAC) using the GEO database [10,11]. This evidence concerns the gene SFMBT1 and pancreatic ductal adenocarcinoma.