1. Department of Pathology; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts
2. Department of Biostatistics and Computational Biology; Dana-Farber Cancer Institute; Boston Massachusetts
3. Lymphoma Service; Memorial Sloan Kettering Cancer Center; New York New York
4. Department of Pathology; North Shore Medical Center; Salem Massachusetts
5. Department of Pathology; University of Michigan; Ann Arbor Michigan
6. Center for Lymphoma, Massachusetts General Hospital Cancer Center and Department of Medicine, Harvard Medical School; Boston Massachusetts