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[DOI] [PMC free article] [PubMed] [Google Scholar] [54].Ryu JK, Sozmen EG, Dixit K, Montano M, Matsui Y, Liu Y, et al
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Some disease states are associated with low total serum vitamin B12 concentrations because of an inability to absorb or digest protein-bound vitamin B12
doi: 10.1016/j.freeradbiomed.2006.05.025
