1. Stanford University School of Medicine; Stanford CA USA
2. SWOG Statistical Center; Seattle WA USA
3. Wake Forest University School of Medicine; Wake Forest NC USA
4. University of New Mexico Cancer Center; Albuquerque NM USA
5. University of Chicago; Chicago IL USA
6. Montefiore Medical Center; North Division, Bronx NY USA
7. Roswell Park Cancer Institute; Buffalo NY
8. Massachusetts General Hospital; Boston MA USA
9. Northwestern University; Chicago IL USA
10. Johns Hopkins University; Baltimore MD USA
11. Memorial Sloan Kettering Cancer Center; New York NY USA
12. Fred Hutchinson Cancer Research Center; Seattle WA USA