title: Long-term precision of carcinoembryonic antigen assays.
mesh_terms: D002272:Carcinoembryonic Antigen / Q000032:analysis*; D005770:Gastrointestinal Neoplasms / Q000276:immunology*; D006801:Humans; D011933:Reagent Kits, Diagnostic; D013997:Time Factors
chemical_list: D002272:Carcinoembryonic Antigen; D011933:Reagent Kits, Diagnostic