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B12 is an essential vitamin that is important for the production of red blood cells, DNA, and nerve function
Limited evidence from animal studies suggests potential interactions with certain antibiotics
eGFR (estimated glomerular filtration rate): A marker of kidney filtration function
wait a few seconds before withdrawing the needle to prevent backflow
Spanish / English speaking guide
If you must use SWFI, treat the vial as single-use and discard after one draw
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