title: Letter: Disparity between CEA-Roche "indirect" and "direct" carcinoembryonic antigen values: clinical relevance.
mesh_terms: D002272:Carcinoembryonic Antigen / Q000032:analysis*; D003110:Colonic Neoplasms / Q000175:diagnosis; D006801:Humans; D008722:Methods; D011379:Prognosis
chemical_list: D002272:Carcinoembryonic Antigen