RT Journal Article SR Electronic T1 Melatonin JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1923 OP 1923 DO 10.1503/cmaj.111765 VO 184 IS 17 A1 Carter, Michael D. A1 Juurlink, David N. YR 2012 UL http://www.cmaj.ca/content/184/17/1923.abstract AB