RT Journal Article SR Electronic T1 Mechanical bowel preps improve surgical outcomes in colorectal surgery JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 27 OP 27 DO 10.1136/ebmed-2015-110323 VO 21 IS 1 A1 Christopher Mantyh YR 2016 UL http://ebm.bmj.com/content/21/1/27.abstract AB