S. Naghizadeh, S. Kheirouri, H. Ojaghi, and A. Jafari Kaffash, “Zinc supplementation attenuate diabetic indices in patients with diabetic retinopathy”, Progr Nutr, vol. 20, no. 2-S, pp. 263–269, Dec. 2018, doi: 10.23751/pn.v20i2-S.5572.