RT Journal Article SR Electronic T1 Should metformin be preferred over insulin therapy in the management of gestational diabetes (GDM)? JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP e60 OP e60 DO 10.1136/eb-2013-101329 VO 18 IS 6 A1 Shannon D Sullivan YR 2013 UL http://ebm.bmj.com/content/18/6/e60.abstract AB