TLR9 and gastric cancer: A significantly increased risk of gastric cancer associated with C carriers was evident among females (adjusted OR = 1.84, 95%CI = 1.02–3.33), subjects with H. pylori infection (adjusted OR = 1.53, 95% CI = 1.03–2.27), and noncardia gastric cancer patients (adjusted OR = 1.51, 95% CI = 1.03–2.20), compared with the TLR9 -1486 TT genotypes.