RT Journal Article SR Electronic T1 Clinical practice guidelines for the care and treatment of breast cancer: Mastectomy or lumpectomy? The choice of operation for clinical stages I and II breast cancer (summary of the 2002 update) JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 154 OP 155 VO 167 IS 2 A1 Hugh Scarth A1 Jacques Cantin A1 Mark Levine A1 The Steering Committee on Clinical Practice Guidelines for the Care and Treatment of Breast Cancer YR 2002 UL http://www.cmaj.ca/content/167/2/154.abstract