OAS1 and pancreatic neoplasm: In addition, we explored the relationship between OAS1 and immune checkpoints by analyzing multiple pancreatic cancer bulk transcriptome datasets (GSE71729, GSE21501, ICGC_array, E_MTAB_6134, ICGC_CA_seq, GSE79668, GSE62452, GSE78229, GSE28735, TCGA_PAAD, GSE57495).