Unung, P. J.; Bassey, I. E.; Etukudo, M. H.; Udoh, A. E.; Alhassan, M. B.; Akpan, U. O. Effect of Glycemic Control and Dyslipidemia on Plasma Vascular Endothelial Growth Factor and Pigment Epithelium-Derived Factor in Diabetic Retinopathy Patients in Northern Nigeria. IJHS 2020, 14, 4-12.