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Laboratories remain responsible for internal validation, controlled handling, recordkeeping, and compliance procedures associated with the material after receipt
Incorrect injection can cause pain, bruising, or swelling
Vitamin B12 is water-soluble, and the body excretes excess amounts through urine rather than storing supraphysiological levels
In the evaluation of RCT quality, 3 studies scored two points, indicating low-quality study and high risk of bias
Intramuscular injections of vitamin B12 are widely used as a standard treatment for vitamin B12 deficiency
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