Documents Savoirs Participation of the PI-3K/Akt-NF-κB signaling pathways in hypoxia-induced mitogenic factor-stimulated Flk-1 expression in endothelial cells Tong Qiangsong, Zheng Liduan, Wang Danming, Huang Chuanshu, Matuschak, Li Dechun, Li, Bo Li, Lin Li