Every 1-2 weeks during the first 4 weeks of the study, you will have around 2 tablespoons of blood drawn for routine blood tests. The blood tests will be repeated every 4-6 weeks until 1 year from when you started therapy and then every 3-4 months until 2 years, then as often as the doctor thinks it is needed. A bone marrow aspiration will also be taken to check the status of the disease every 3-4 months for the first year and then as often as the doctor thinks it is needed for as long as you are on the study.