- Oh S, Kwon H, Kim S, Lee S, Lee J, Hwang J, et al. The relationship of vascular endothelial growth factor gene polymorphisms and clinical outcome in advanced gastric cancer patients treated with FOLFOX: VEGF polymorphism in gastric cancer. BMC Cancer. 2013;13:43 pubmed publisher..497, P?=?0.017). Our data suggest that G/G genotype of VEGF -634?G/C polymorphism is related to the higher serum levels of VEGF, and poor clinical outcome in advanced gastric cancer patients. ..