1. The University of Massachusetts Medical School; Worcester; MA; USA
2. Dana-Farber Cancer Institute and Harvard School of Public Health; Boston; MA; USA
3. Northwestern University Feinberg School of Medicine; Chicago; IL; USA
4. University of Rochester; Rochester; NY; USA
5. Washington University; St. Louis; MO; USA
6. BC Cancer Agency Centre for Lymphoid Cancer; Vancouver; BC; Canada
7. Penn State Cancer Institute; Hershey; PA; USA
8. Princess Margaret Hospital; Toronto; ON; Canada
9. Georgetown University Hospital; Washington; DC; USA
10. Loyola University; Chicago; IL; USA
11. University of Arizona; Tucson; AZ; USA
12. Stanford University; Palo Alto; CA; USA
13. University of Wisconsin; Madison; WI; USA
14. Genentech, Inc; San Francisco; CA; USA