Clinical defects in the assimilation of vitamin B12.
D000752:Anemia, Pernicious / Q000276:immunology; D000917:Antibody Formation; D006801:Humans; D007408:Intestinal Absorption; D007437:Intrinsic Factor / Q000378:metabolism; D014805:Vitamin B 12 / Q000378:metabolism*
D007437:Intrinsic Factor; D014805:Vitamin B 12