Department of Internal Medicine, Section of Hematology, Yale School of Medicine, New Haven, CT, USA. Division of Hematology and Oncology, University of Alabama School of Medicine, Birmingham, AL, USA. Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) Center, Yale University, New Haven, CT, USA. Department of Chronic Disease Epidemiology, School of Public Health, Yale University, New Haven, CT, USA. Rockefeller University, New York, NY, USA. Leukemia Service, Memorial Sloan Kettering Cancer Center, New York, NY, USA. Leukemia Service, Memorial Sloan Kettering Cancer Center, New York, NY, USA. stahlm@mskcc.org.