Retinal vascular endothelial growth factor induces intercellular adhesion molecule-1 and endothelial nitric oxide synthase expression and initiates early diabetic retinal leukocyte adhesion in vivo. - Joussen,A.M.; Poulaki,V.; Qin,W.; Kirchhof,B.; Mitsiades,N.; Wiegand,S.J. (Am J Pathol, 2002)