title: Approach to a low vitamin B12 level.
authors.affiliation: University of Southern California, Los Angeles.
authors.forename: R
authors.initials: R
authors.lastname: Carmel
mesh_terms: D000368:Aged; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis* / Q000628:therapy*
chemical_list: D014805:Vitamin B 12