CRK and gastric cancer: In the extension phase, two SNPs, rs6122566 and rs6124914, in SRC gene and rs7208768 in CRK remained significantly associated with an increased risk for gastric cancer (OR = 4.01, [95% CI: 1.62–9.96]; OR = 1.30, [95% CI: 1.00–1.70]; OR = 1.33, [95% CI: 1.08–1.64], respectively).