title: Radioimmunoassay of carcinoembryonic antigen: observations and methodological variations.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002272:Carcinoembryonic Antigen / Q000302:isolation & purification*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay
chemical_list: D002272:Carcinoembryonic Antigen