TGFB1 and neoplasm: Several factors such as transforming growth factor (TGF)‐β1 10, 14, osteopontin 15, 78 kDa glucose‐regulated protein (GRP78) 13, and basic fibroblast growth factor (bFGF) 31 were highly enriched in tumor cell‐conditioned medium and were required for inducing CAF‐like differentiation of BM‐MSCs.