Vanderbilt University - Vanderbilt-Ingram Cancer Center, University of Chicago - Medical Center, Harvard University - Massachusetts General Hospital, Harvard University - Dana-Farber Cancer Institute, The John Hopkins Hospital, Medical College of Wisconsin, Rutgers, The State University of New Jersey - Hackensack University Medical Center, Horizon Oncology Center, University of Texas at Houston - Department of Leukemia, Astex Pharmaceuticals, Inc., Astex Pharmaceuticals, Inc., Astex Pharmaceuticals, Inc. and University of Texas at Houston - Department of Leukemia