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Subgroup analysis for the association between MMR expression and OS in CRC. A, different geographical regions (Asia, west); (B) different subtypes of gene (MMR, hMSH2, hMLH1); (C) different methods for detection of MMR (immunohistochemistry [IHC], polymerase chain reaction [PCR]). CRC indicates colorectal cancer; MMR, mismatch repair; OS, overall survival.
