RT Journal Article SR Electronic T1 Sleepless in the surgical ward JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1095 OP 1096 DO 10.1503/cmaj.090772 VO 180 IS 11 A1 Collier, Roger YR 2009 UL http://www.cmaj.ca/content/180/11/1095.abstract