Hypoxia‐inducible factor 1α/vascular endothelial growth factor axis in astrocytomas. Associations with microvessel morphometry, proliferation and prognosis - P Korkolopoulou; Patsouris, E.; Konstantinidou, AE; Pavlopoulos, PM; Kavantzas, N.; Boviatsis, E; Thymara, I.; Perdiki, M; Thomas‐Tsagli, E; Angelidakis, D (Neuropathology and applied neurobiology, 2004)