RT Journal Article SR Electronic T1 Distress and low back pain are linked in schoolchildren JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 511 OP 511 DO 10.1136/ard.62.6.511 VO 62 IS 6 YR 2003 UL http://ard.bmj.com/content/62/6/511.abstract AB