RT Journal Article SR Electronic T1 The evolving TNM cancer staging system: an essential component of cancer care JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 155 OP 156 DO 10.1503/cmaj.045113 VO 174 IS 2 A1 Brierley, James YR 2006 UL http://www.cmaj.ca/content/174/2/155.abstract