RT Journal Article SR Electronic T1 Evaluation of a radioimmunoassay for carcinoembryonic antigen of the human digestive system JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 25 OP 31 VO 39 IS 1 A1 LeBel, J. Serge A1 Deodhar, Sharad D. A1 Brown, Charles H. YR 1972 UL http://www.ccjm.org/content/39/1/25.abstract AB