title: Assessment of vitamin B12 status in CSF.
mesh_terms: D000328:Adult; D000368:Aged; D003704:Dementia / Q000097:blood / Q000134:cerebrospinal fluid; D003937:Diagnosis, Differential; D006801:Humans; D008875:Middle Aged; D019965:Neurocognitive Disorders / Q000097:blood / Q000134:cerebrospinal fluid*; D014805:Vitamin B 12 / Q000097:blood / Q000134:cerebrospinal fluid*; D014806:Vitamin B 12 Deficiency / Q000097:blood / Q000134:cerebrospinal fluid
chemical_list: D014805:Vitamin B 12