VEGFA and non-Hodgkin lymphoma: Subgroup analysis further showed that VEGF overexpression in surgical tissue (HR = 1.95, 95% CI: 1.41–2.69, P = 0.000) but not in serum (HR = 1.37, 95% CI: 0.96–1.95, P = 0.087) negatively correlated with OS of NHL.