Chapman, L E Association between metformin and vitamin B [electronic resource] - Diabetes & metabolism Nov 2016 - 316-327 p. digital Publication Type: Journal Article; Meta-Analysis; Review; Systematic Review ISSN: 1878-1780 Standard No.: 10.1016/j.diabet.2016.03.008 doi Subjects--Topical Terms: AdultAgedAged, 80 and overDiabetes Mellitus, Type 2--complicationsFemaleHumansHypoglycemic Agents--adverse effectsMaleMetformin--adverse effectsMiddle AgedVitamin B 12 Deficiency--chemically induced