Relative expression levels of immunoregulatory cytokines expressed by CAF (CAF/NCAF). Total RNA was purified from thawed samples, and cDNA was synthesized. All the analyses were performed using the Student's t‐test. CAF, cancer‐associated fibroblasts; IL‐10, interleukin‐10; NCAF, non‐cancer‐associated fibroblasts; TGF‐β, transforming growth factor‐β; Treg, regulatory T cells; VEGF, vascular endothelial growth factor.