1. Tufts Medical Center; Boston Massachusetts
2. Johns Hopkins University School of Medicine; Baltimore Maryland
3. Centre for Lymphoid Cancer, British Columbia Cancer Agency; Vancouver BC Canada
4. Hackensack University Medical Center; Hackensack New Jersey
5. Quantitative Health Sciences, The University of Massachusetts (UMASS); Worcester Massachusetts
6. Massachusetts General Hospital Cancer Center; Boston Massachusetts
7. Northwestern University Feinberg School of Medicine; Chicago Illinois
8. Roswell Park Cancer Institute; Buffalo New York
9. Hematology/Oncology, UMASS; Massachusetts
10. Loyola University Medical Center; Maywood Illinois
11. Ohio State University; Columbus Ohio
12. Washington University School of Medicine; St Louis Missouri
13. Case Western Reserve University; Cleveland Ohio
14. Stanford University; Palo Alto California
15. The University of Chicago; Chicago Illinois
16. University of Miami School of Medicine; Miami Florida
17. Hutchinson Cancer Research Center; Seattle Washington
18. Medical College of Wisconsin; Milwaukee Wisconsin
19. University of Rochester; Rochester New York
20. University of Nebraska Medical Center; Omaha Nebraska