1. Department of Leukemia; The University of Texas, M.D. Anderson Cancer Center; Houston; Texas
2. Department of Lymphoma and Myeloma; The University of Texas, M.D. Anderson Cancer Center; Houston; Texas
3. Department of Pathology; University of Wurzburg; Wurzburg; Germany
4. Department of Hematopathology; The University of Texas, M.D. Anderson Cancer Center; Houston; Texas