RT Journal Article SR Electronic T1 Deep sedation for colonoscopy is unnecessary and wasteful JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E153 OP E154 DO 10.1503/cmaj.170953 VO 190 IS 6 A1 David Pace A1 Mark Borgaonkar YR 2018 UL http://www.cmaj.ca/content/190/6/E153.abstract AB