title: [Comparison of CEA levels by the one step and the two step sandwich method (author's transl)].
mesh_terms: D002272:Carcinoembryonic Antigen / Q000032:analysis*; D005069:Evaluation Studies as Topic; D006801:Humans; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D002272:Carcinoembryonic Antigen