The treatment of chronic leukaemia.
D000368:Aged; D001623:Betamethasone / Q000627:therapeutic use; D002066:Busulfan / Q000627:therapeutic use*; D002699:Chlorambucil / Q000627:therapeutic use; D006801:Humans; D007945:Leukemia, Lymphoid / Q000188:drug therapy*; D007951:Leukemia, Myeloid / Q000188:drug therapy*; D008875:Middle Aged; D011239:Prednisolone / Q000627:therapeutic use