Drupal-Bibcite31<style face="normal" font="default" size="100%">Incidence of lactic acidosis in patients with type 2 diabetes with and without renal impairment treated with metformin: a retrospective cohort study</style><style face="normal" font="default" size="100%">Incidence of lactic acidosis in patients with type 2 diabetes with and without renal impairment treated with metformin: a retrospective cohort study</style>