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PMID 11713213
WADA's 2022 Prohibited List now in force
They usually last 30 minutes to an hour
An elevated serum vitamin B12 is best interpreted against the laboratory's own reference ranges and assay context, with attention to the source-sensitive details along the way and escalation to targeted testing or specialty referral reserved for when a clinician-guided pathway supports it
B12s role in red blood cell production is critical here
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