RT Journal Article SR Electronic T1 Perioperative use of chewing gum affects the inflammatory response and reduces postoperative ileus following major colorectal surgery JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 185 OP 186 DO 10.1136/ebmed-2015-110190 VO 20 IS 5 A1 Bruce U Su'a A1 Andrew G Hill YR 2015 UL http://ebm.bmj.com/content/20/5/185.abstract AB