Before the study begins, you will have a complete physical exam and have blood (around 1-2 tablespoons) and urine collected for routine tests. You will have x-rays and CT scans to check on the status of the disease. A sample of bone marrow will be collected for tests. To collect a bone marrow sample, an area of the hip or chest bone is numbed with anesthetic and a small amount of bone marrow is withdrawn through a large needle. Your heart and lung function will be evaluated. You will have an electrocardiogram (ECG - a test that measures the electrical activity of the heart) and either a echocardiogram or a multigated acquisition scan (MUGA) (these are tests that measure heart functions). You will also have lung function tests. Women who are able to have children must have a negative blood or urine pregnancy test.