RT Journal Article SR Electronic T1 Existing evidence is insufficient to justify metformin or other agents as first-line therapy for type 2 diabetes JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 224 OP 224 DO 10.1136/ebmed-2016-110562 VO 21 IS 6 A1 Rene Rodriguez-Gutierrez A1 Victor M Montori YR 2016 UL http://ebm.bmj.com/content/21/6/224.abstract AB