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Speed: In emergencies like heart attacks or blood transfusions, wider needles (lower gauge) allow for rapid medication delivery
Vitamin B12 injections: considerable source of work for the district nurse Its title should really be arbitrary rationing of B12 injections
Greenfield, B
Macro-B12 should be suspected when a markedly high value persists with no B12 exposure, sits with an unrevealing workup, and disagrees with functional markers
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