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Take it on an empty stomach with no more than 4 oz of water, then no food, drink, or other oral medication for at least 30 minutes
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Elevated Serum Vitamin B12: Causes, Workup, and Clinical Meaning A patient comes in after routine blood work, and the report flags a serum vitamin B12 of 1,250 pg/mL
Sheep: 1 1.5 mL pre-lambing
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Results were reportedly positive, but the published data is limited
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