Before you can start treatment on this study, you will have "screening tests." These tests will help the doctor decide if you are eligible to take part in this study. You will have a complete physical exam, including measurement of your vital signs (blood pressure, heart rate, temperature, and breathing rate). You will have blood drawn (about 8 teaspoons) for routine tests. You may have a chest x-ray and computed tomography (CT) scans, if needed. You will have a bone marrow biopsy performed. To collect a bone marrow biopsy, an area of the hip or chest bone is numbed with anesthetic, and a small amount of bone marrow and bone is withdrawn through a large needle. You may have an electrocardiogram (ECG -- a test that measures the electrical activity of the heart) or echocardiogram, if you have a history of heart disease. Women who are able to have children must have a negative blood (about 1 teaspoon or from the routine blood sample) pregnancy test.