You will have an electrocardiogram (ECG—a test of the electrical activity of your heart) and a physical exam once every 3 months while on study. Blood (about 2-3 teaspoons) will be drawn for routine tests once a week for 1 month and then once a month for the rest of your treatment on this study. A bone marrow biopsy and aspiration will be performed, as needed, to check the status of the disease. To collect a bone marrow aspirate and biopsy, an area of the hip or chest bone is numbed with anesthetic, and a small amount of bone marrow and bone is withdrawn through a large needle.