title: Macrocytosis in the elderly.
mesh_terms: D000368:Aged; D000748:Anemia, Macrocytic / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology; D001323:Autoantibodies / Q000032:analysis; D001853:Bone Marrow / Q000473:pathology; D005492:Folic Acid / Q000097:blood; D006801:Humans; D008297:Male; D014805:Vitamin B 12 / Q000097:blood
chemical_list: D001323:Autoantibodies; D005492:Folic Acid; D014805:Vitamin B 12