NAT1 and colorectal carcinoma: And the results of Egger's test did not suggest any evidence of publication bias (P = 0.353 for NAT1 genotype with CRC, P = 0.931 for NAT2 genotype with CRC, P = 0.183 for NAT1 genotype with CRA, P = 0.802 for NAT2 genotype with CRA).