Abdulhussein Alwan Algenabi3Seenaa Badr Al-Awadi1. 2019. “Pigment Epithelium Derived Factor and Vascular Endothelial Growth Factor in Diabetic Retinopathy”. Iraqi Journal of Biotechnology 13 (2). https://jige.uobaghdad.edu.iq/index.php/IJB/article/view/278.