RT Journal Article SR Electronic T1 Residual leukaemia was not associated with relapse and was present during remission in children with acute lymphoblastic leukaemia JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 155 OP 155 DO 10.1136/ebm.1997.2.155 VO 2 IS 5 YR 1997 UL http://ebm.bmj.com/content/2/5/155.abstract AB