Namazi, Mohammad Hasan, et al. “Is It Necessary to Discontinue Metformin in Diabetic Patients With GFR > 60 Ml Min Per 1.73 M2 Undergoing Coronary Angiography: A Controversy Still Exists?”. Acta Biomedica Atenei Parmensis, vol. 89, no. 2, June 2018, pp. 227-32, https://doi.org/10.23750/abm.v89i2.5446.