Nature · 1953 · 53 citations · 0 references
Life SciencesMicrobiologyPharmacologyBioavailabilityMass Spectrometric AnalysisNutritional BiochemistryMetabolite IdentificationVitamin B12 PhysiologyVitamin BiochemistryVitamin ChemistryVitamin MetabolismVitamin PhysiologyAssayB VitaminsMicrobiological DiagnosticsVitamin B12 (Cobalamin)Vitamin B12 Metabolism