RT Journal Article SR Electronic T1 Oh Christmas Tree, Oh Christmas Tree ... JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1435 OP 1436 DO 10.1503/cmaj.045017 VO 171 IS 12 A1 Natalie Yanchar A1 Paul Pianosi A1 Robert Fraser YR 2004 UL http://www.cmaj.ca/content/171/12/1435.abstract