RT Journal Article SR Electronic T1 Canadian breast cancer guidelines are as effective as possible under the circumstances JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 785 OP 786 DO 10.1503/cmaj.070164 VO 176 IS 6 A1 Eva Grunfeld YR 2007 UL http://www.cmaj.ca/content/176/6/785.abstract