<qa>  What is the name of the drug that is approved by the Food and Drug Administration?In this study, researchers tested a combination of anti-cancer agents, fludarabine, rituximab and GM-CSF with mitoxantrone or cyclophosphamide to see if a better and more long-lasting response can be achieved. All of the medications are approved by the Food and Drug Administration FDA and are available on the market. The agents we will use are: 