RT Journal Article SR Electronic T1 Lowering homocysteine with folic acid and B vitamins did not prevent vascular events in vascular disease JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 104 OP 104 DO 10.1136/ebm.11.4.104 VO 11 IS 4 YR 2006 UL http://ebm.bmj.com/content/11/4/104.abstract AB