RT Journal Article SR Electronic T1 Review: evidence on the effectiveness of interventions to assist patient adherence to prescribed medications is limited JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 123 OP 123 DO 10.1136/ebm.8.4.123 VO 8 IS 4 YR 2003 UL http://ebm.bmj.com/content/8/4/123.abstract AB