Association between five polymorphisms in vascular endothelial growth factor gene and urinary bladder cancer risk: A systematic review and meta-analysis involving 6671 subjects

Vascular endothelial growth factor (VEGF) gene plays a key role in angiogenesis and tumor growth. The relationship between VEGF gene polymorphisms and bladder cancer (BCa) risk was studied extensively in recent years. However, the currently available results are controversial. To ascertain whether VEGF polymorphisms are associated with the susceptibility to BCa, we conducted this systematic review and meta-analysis. Relevant studies were...