RT Journal Article SR Electronic T1 Review: brief primary care interventions are moderately effective for increasing physical activity JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 45 OP 45 DO 10.1136/ebn.4.2.45 VO 4 IS 2 YR 2001 UL http://ebn.bmj.com/content/4/2/45.abstract AB