CYP1A1 and gastric cancer: Notably, a meta-analysis of the published data of CYP1A1 and CYP1A2 polymorphisms in different ethnicities revealed possible associations between CYP1A1 MspI and CYP1A2*1F polymorphisms and gastric cancer, and no significant associations between CYP1A1 Ile462Val polymorphism and gastric cancer [88].