RT Journal Article SR Electronic T1 Review: periodic health examination increases delivery of some clinical preventive services and reduces patient worry JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 118 OP 118 DO 10.1136/ebm.12.4.118 VO 12 IS 4 YR 2007 UL http://ebm.bmj.com/content/12/4/118.abstract AB