The major goal of Induction therapy is to use a combination of chemotherapy drugs to try to eliminate as many of the leukemia cells as possible. We will also collect information from you that may be used to help further define your risk group before you move on to the next phase of treatment. Your risk group will determine the type of treatment you will be offered in the next phase of this study. You will be offered the chance to continue treatment on this study after you complete Induction therapy.