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Hasan, S.H., Samad, R., Das, J.C., Ara, F. and Faisal, M.A. 2020. Hyperpigmentation with Vitamin B12 Deficiency in an Adolescent Girl. Journal of Bangladesh College of Physicians and Surgeons. 39, 1 (Nov. 2020), 62–67. DOI:https://doi.org/10.3329/jbcps.v39i1.50461.