RT Journal Article SR Electronic T1 Review: health care decision aids improve knowledge, decrease decisional conflict, and increase active participation JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 60 OP 60 DO 10.1136/ebm.5.2.60 VO 5 IS 2 YR 2000 UL http://ebm.bmj.com/content/5/2/60.abstract AB