RT Journal Article SR Electronic T1 Code 9 9 9 1 STAT JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 733 OP 733 DO 10.1503/cmaj.080109 VO 178 IS 6 A1 John Chong MD YR 2008 UL http://www.cmaj.ca/content/178/6/733.abstract