The nervous system in B-12 deficiency in spite of normal absorption.
D000368:Aged; D004032:Diet; D005260:Female; D006801:Humans; D007408:Intestinal Absorption; D008297:Male; D008875:Middle Aged; D009461:Neurologic Manifestations; D012546:Schilling Test; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis* / Q000209:etiology