Mechanisms involved in the development of vitamin B12 deficiency.
D004194:Disease; D005750:Gastric Juice; D006801:Humans; D007410:Intestinal Diseases; D007422:Intestines; D014806:Vitamin B 12 Deficiency / Q000502:physiology*
GASTRIC JUICE; INTESTINES/diseases; VITAMIN B12 DEFICIENCY/physiology