CTLA4 and colorectal carcinoma: In addition, CRC patients were divided into high‐PD‐L1 and low‐PD‐L1 or high‐PD‐1 and low‐PD‐1 or high‐CTLA‐4 and low‐CTLA‐4 or high‐TMB and low‐TMB or MSS and MSI groups by the median values of PD‐L1, PD‐1, CTLA‐4 and TMB or the status of microsatellite.