1. Department of Biostatistics, Yale University School of Public Health, New Haven, Connecticut
2. Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor
3. Department of Health Management and Policy, University of Michigan School of Public Health, Ann Arbor
4. Program in Biostatistics and Biomathematics, Fred Hutchinson Cancer Research Center, Seattle, Washington
5. Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC