CD4 and familial pancreatic carcinoma: When the outcomes of the four algorithms TIMER, CIBERSORT, XCELL, and MCPcounter were taken into account collectively, CD4+ T cells emerged as the distinct immune cells between the high- and low-risk subgroups, indicating that the telomere-related signature may modulate CD4+ T cell infiltration to worsen the prognosis of pancreatic cancer.