RT Journal Article SR Electronic T1 Two-year follow-up study of patients with known serum concentrations of carcinoembryonic antigen JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 657 OP 659 VO 117 IS 6 A1 Band, P. R. A1 Beck, I. T. A1 Dinner, P. J. A1 Miller, A. B. YR 1977 UL http://www.cmaj.ca/content/117/6/657.abstract