RT Journal Article SR Electronic T1 Metformin (alone or with insulin) was as effective as insulin for preventing perinatal complications in gestational diabetes JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 150 OP 151 DO 10.1136/ebm.13.5.150 VO 13 IS 5 YR 2008 UL http://ebm.bmj.com/content/13/5/150.abstract AB