Detection of vascular endothelial growth factor and tumor necrosis factor alpha in epiretinal membranes of proliferative diabetic retinopathy, proliferative vitreoretinopathy, and macular pucker. - Armstrong,D.; Augustin,A.J.; Spengler,R.; Al-Jada,A.; Nickola,T.; Grus,F.; Koch,F. (Ophtalmologica, 1998)