Prevalence of Vitamin B12 Deficiency and its Associated Factors among Patients with Type 2 Diabetes Mellitus on Metformin from a District in Malaysia | Journal of the ASEAN Federation of Endocrine Societies
Vitamin B12 Deficiency: Recognition and Management | AAFP
Deficiency of vitamin B12 and its relation with neurological disorders: a critical review | The Journal of Basic and Applied Zoology | Full Text