1. Yale School of Public Health; New Haven, Connecticut
2. Division of Cancer Epidemiology and Genetics, Department of Health and Human Services; National Cancer Institute, National Institutes of Health; Bethesda, Maryland
3. Vaccine and Infectious Disease; Public Health Sciences and Clinical Research Divisions, Fred Hutchinson Cancer Research Center; Seattle, Washington
4. Uganda Virus Research Institute; Entebbe; Uganda
5. Department of Laboratory Medicine; University of Washington; Seattle, Washington