title: [Regarding the diagnosis of vitamin B 12 deficiency].
authors.forename: C
authors.initials: C
authors.lastname: Aguirre Errasti
mesh_terms: D000367:Age Factors; D015415:Biomarkers / Q000097:blood; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D008764:Methylmalonic Acid / Q000097:blood*; D012016:Reference Values; D014806:Vitamin B 12 Deficiency / Q000097:blood / Q000175:diagnosis* / Q000209:etiology
chemical_list: D015415:Biomarkers; D006710:Homocysteine; D008764:Methylmalonic Acid