RT Journal Article SR Electronic T1 Alexander technique lessons were effective for chronic or recurrent back pain at 1 year JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 13 OP 13 DO 10.1136/ebm.14.1.13 VO 14 IS 1 YR 2009 UL http://ebm.bmj.com/content/14/1/13.abstract AB