RT Journal Article SR Electronic T1 Incidence of long term backache was similar between women receiving epidural analgesia during labour and those who did not JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 144 OP 144 DO 10.1136/ebm.6.5.144 VO 6 IS 5 YR 2001 UL http://ebm.bmj.com/content/6/5/144.abstract AB