RT Journal Article SR Electronic T1 Review: psychological interventions reduce the severity and frequency of chronic pain in children and adolescents JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 89 OP 89 DO 10.1136/ebm.8.3.89 VO 8 IS 3 YR 2003 UL http://ebm.bmj.com/content/8/3/89.abstract AB