Naghizadeh, S., S. Kheirouri, H. Ojaghi, and A. Jafari Kaffash. “Zinc Supplementation Attenuate Diabetic Indices in Patients With Diabetic Retinopathy”. Progress in Nutrition, vol. 20, no. 2-S, Dec. 2018, pp. 263-9, doi:10.23751/pn.v20i2-S.5572.