Fig. 2From: Serum lactate level and mortality in metformin-associated lactic acidosis requiring renal replacement therapy: a systematic review of case reports and case seriesLevels of serum metformin are plotted versus the serum lactate levels (a) and the estimated metformin dosage (b). There are significant positive correlation between serum metformin and lactate levels and between serum metformin levels and the estimated metformin dosageBack to article page