title: Is testing for clinical cobalamin deficiency truly unreliable?
authors: Ralph
authors: R
authors: Carmel
mesh_terms: D003951:Diagnostic Errors; D006801:Humans; D014805:Vitamin B 12 / Q000032:analysis; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis*
chemical_list: D014805:Vitamin B 12