VEGFA and cancer: Investigations suggest that RSV may act as an anticancer agent to inhibit angiogenesis through affecting hypoxia‐inducible factor‐1 alpha (HIF‐1α) and vascular endothelial growth factor (VEGF) in different cancer cells in vitro (Garvin, Öllinger, & Dabrosin, 2006; Zhang et al., 2005).