CD274 and colorectal carcinoma: Furthermore, recent studies reported that expression of circCDR1‐AS, circ‐CPA4 and circ0000284 in several types of cancer, such as CRC, NSCLC, liver and pancreatic cancer, are associated with PD‐L1 expression by targeting CMTM4, let‐7 and miR‐377‐3p.124, 125, 126