 You may receive the intensive chemotherapy for up to 8 cycles up to 8 months and then maintenance therapy for up to 2 years. You may continue to take ruxolitinib or dasatinib every day for as long as the doctor thinks it is in your best interest. You will no longer be able to take the study drugs if the disease gets worse, if intolerable side effects occur, or if you are unable to follow study directions. 