1. Department of Lymphoma and Myeloma; The University of Texas M. D. Anderson Cancer Center; Houston TX USA
2. Department of Medical Oncology; Thomas Jefferson University; Philadelphia PA USA
3. Division of Hematology and Oncology; University of Florida; Gainesville FL USA
4. Department of Biostatistics; The University of Texas M. D. Anderson Cancer Center; Houston TX USA
5. Division of Diagnostic Imaging; The University of Texas M. D. Anderson Cancer Center; Houston TX USA
6. Lymphoma Service; Memorial Sloan Kettering Cancer Center; New York NY USA