Results of three years' experience with microbiological assay of vitamin B12 in serum.
D001681:Biological Assay; D045728:Corrinoids; D006397:Hematinics; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood*
D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12
VITAMIN B12/in blood
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