Nutrients | Free Full-Text | Influences of Vitamin B12 Supplementation on Cognition and Homocysteine in Patients with Vitamin B12 Deficiency and Cognitive Impairment
Vitamin B-12 level test: Uses, normal ranges, and results
Serum vitamin B12 levels in patients with Parkinson's disease and its association with peripheral neuropathy and cognition - MDS Abstracts