- Vascular endothelial growth factor B, a novel growth factor for endothelial cells. Olofsson, B., Pajusola, K., Kaipainen, A., von Euler, G., Joukov, V., Saksela, O., Orpana, A., Pettersson, R.F., Alitalo, K., Eriksson, U. Proc. Natl. Acad. Sci. U.S.A. (1996)