1. Department of Medicine, University of Washington, Seattle, WA;
2. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA;
3. Infectious Disease Service, Department of Medicine, and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY;
4. Division of Public Health Sciences, and
5. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA; and
6. Department of Biostatistics, University of Washington, Seattle, WA