RT Journal Article SR Electronic T1 Krever 2008 JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1179 OP 1180 VO 160 IS 8 A1 M. T. Schechter A1 M. V. O'Shaughnessy YR 1999 UL http://www.cmaj.ca/content/160/8/1179.abstract AB