title: Acquired severe aplastic anemia: progress and perplexity.
mesh_terms: D000328:Adult; D000741:Anemia, Aplastic / Q000209:etiology* / Q000276:immunology / Q000628:therapy; D000961:Antilymphocyte Serum / Q000627:therapeutic use; D001327:Autoimmune Diseases / Q000150:complications / Q000276:immunology; D016026:Bone Marrow Transplantation; D006680:HLA Antigens; D006801:Humans; D008875:Middle Aged
chemical_list: D000961:Antilymphocyte Serum; D006680:HLA Antigens