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10.1038/s41572-020-0187-8 [DOI] [PubMed] 55.Vidal-Alaball J, Butler CC, Potter CC (2006) Comparing costs of intramuscular and oral vitamin B12 administration in primary care: a cost-minimization analysis
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PubMed Central PMCID: PMC5867019 10.1111/bph.13988 [DOI] [PMC free article] [PubMed] [Google Scholar] 8.Refsum H., Helland S
