Methylenetetrahydrofolate reductase (MTHFR) 677C>T rs1801133 genetic variant, homocysteine, folate, and vitamin B12 levels in patients with multiple sclerosis: a scoping review. - Ribeiro CM; Oliveira SR; Alfieri DF; Lozovoy MAB; Simão ANC; Reiche EMV (Multiple sclerosis and related disorders, 2025)