Free serum vitamin B12 level in certain hematologic disorders.
D006397:Hematinics; D006402:Hematologic Diseases / Q000378:metabolism*; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood*
D006397:Hematinics; D014805:Vitamin B 12
BLOOD DISEASES/metabolism; VITAMIN B 12/blood