1. Department of Pathology, School of MedicineUniversity of WashingtonSeattle WA
2. Department of EpidemiologyUniversity of WashingtonSeattle WA
3. Division of Cancer Epidemiology and GeneticsNational Cancer InstituteBethesda MD
4. Key Laboratory of Carcinogenesis and Translational ResearchPeking University School of OncologyBeijing People's Republic of China
5. Department of Biostatistics, School of Public Health and Community MedicineUniversity of WashingtonSeattle WA
6. Division of Human BiologyFred Hutchinson Cancer Research CenterSeattle WA