The serum vitamin B12 concentration in pernicious anemia.
D000740:Anemia; D000752:Anemia, Pernicious / Q000097:blood*; D001769:Blood; D045728:Corrinoids; D006397:Hematinics; D006801:Humans; D064028:Tracheophyta; D014805:Vitamin B 12 / Q000097:blood*
D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12
ANEMIA, PERNICIOUS/blood in; BLOOD; VITAMIN B12/in blood