1. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA;
2. Division of Hematology, Department of Medicine, and
3. Department of Epidemiology, University of Washington, Seattle, WA;
4. Southwest Oncology Group Statistical Center, Fred Hutchinson Cancer Research Center, Seattle, WA;
5. Department of Haematology, School of Medicine, Cardiff University, Cardiff, United Kingdom;
6. Department of Hematology, Erasmus University Medical Center, Rotterdam, The Netherlands;
7. Leukemia Department, The University of Texas MD Anderson Cancer Center, Houston, TX;
8. Division of Hematology, VU University Medical Center, Amsterdam, The Netherlands;
9. Department of Biostatistics, Erasmus University Medical Center, Rotterdam, The Netherlands; and
10. Division of Medical Oncology, Department of Medicine, University of Washington, Seattle, WA