Metformin Treatment in Patients With Type 2 Diabetes and Chronic Kidney Disease Stages 3A, 3B, or 4.
Lalau j,  Kajbaf F, Bennis J,  Hurtel-Lemaire A, Belpaire F and De Broe M.
Diabetes Care 2018 Mar; 41(3): 547-553
https://doi.org/10.2337/dc17-2231