RT Journal Article SR Electronic T1 Postoperative radiotherapy reduced local recurrence after surgery for rectal cancer JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 118 OP 118 DO 10.1136/ebm.1997.2.118 VO 2 IS 4 YR 1997 UL http://ebm.bmj.com/content/2/4/118.abstract AB