RT Journal Article SR Electronic T1 Briefly JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 383 OP 384 DO 10.1503/cmaj.090069 VO 180 IS 4 A1 David Manly A1 Wayne Kondro YR 2009 UL http://www.cmaj.ca/content/180/4/383.2.abstract