Henshaw, Eshan B., Love E. Okafor, and Henry J. Ekpenyong. 2022. “Cutaneous Hyperpigmentation As a Diagnostic Marker of Vitamin B12 Deficiency: A Case Report”. International Journal of Research in Dermatology 8 (3):353-57. https://doi.org/10.18203/issn.2455-4529.IntJResDermatol20221015.