Unung, P.J., Bassey, I.E., Etukudo, M.H., Udoh, A.E., Alhassan, M.B. and Akpan, U.O. 2020. Effect of glycemic control and dyslipidemia on plasma vascular endothelial growth factor and pigment epithelium-derived factor in diabetic retinopathy patients in Northern Nigeria. International Journal of Health Sciences. 14, 6 (Nov. 2020), 4–12.