VITAMIN B12 concentration in serum of patients with pernicious anemia.
D000740:Anemia; D000752:Anemia, Pernicious / Q000097:blood*; D001769:Blood; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood*
D014805:Vitamin B 12
ANEMIA, PERNICIOUS/blood in; BLOOD; VITAMIN B12/in blood