For citations:

Cherdak M.A., Mkhitaryan E.A. Vitamin B12 Deficiency in Neurological Disorders of Older Adults: Etiology, Diagnostics, Treatment. Russian Journal of Geriatric Medicine. 2024;(2):100-107. (In Russ.) https://doi.org/10.37586/2686-8636-2-2024-100-107