RT Journal Article SR Electronic T1 Lumbar fusion did not differ from cognitive therapy plus exercise for reducing disability and pain in chronic low back pain JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 51 OP 51 DO 10.1136/ebm.9.2.51 VO 9 IS 2 YR 2004 UL http://ebm.bmj.com/content/9/2/51.abstract AB