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https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1639904
Clarke, R., Evans, J.G., Schneede, J., Nexo, E., Bates, C., Fletcher, A., et al. (2004) Vitamin B12...
Clarke, R., Evans, J.G., Schneede, J., Nexo, E., Bates, C., Fletcher, A., et al. (2004) Vitamin B12 and Folate Deficiency in Later Life. Age and Ageing, 33,...