Sebecic, B., Nikolic, V., Sikiric, P., Seiwerth, S., Sosa, T., Patrlj, L.,
Comparing the efficacy and tolerability of a new daily oral vitamin B12 formulation and intermittent intramuscular vitamin B12 in normalizing low cobalamin levels: a randomized, open-label, parallel-group study
IV delivery is the only practical route to meaningful plasma concentrations
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