title: Clinical and laboratory studies of 22 patients with megaloblastic anemia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000748:Anemia, Macrocytic / Q000097:blood / Q000175:diagnosis* / Q000188:drug therapy / Q000209:etiology; D064420:Drug-Related Side Effects and Adverse Reactions; D005743:Gastrectomy; D006801:Humans; D007421:Intestine, Small / Q000601:surgery; D007970:Leukopenia / Q000150:complications; D008875:Middle Aged; D013921:Thrombocytopenia / Q000150:complications; D014805:Vitamin B 12 / Q000627:therapeutic use
chemical_list: D014805:Vitamin B 12