1. Cancer Institute, Fudan University Shanghai Cancer Center; Department of OncologyShanghai Medical College, Fudan University Shanghai 200032 China
2. Duke Cancer InstituteDuke University Medical Center Durham North Carolina 27710 USA
3. Department of Population Health SciencesDuke University School of Medicine Durham North Carolina 27710 USA
4. Department of Biostatistics and BioinformaticsDuke University School of Medicine Durham North Carolina 27710 USA
5. Department of Radiology, Department of Pharmacology and Cancer BiologyDuke University Medical Center Durham North Carolina 27710 USA
6. Department of Community and Family MedicineDuke University Medical Center Durham North Carolina USA
7. Departments of Environmental Health and Department of EpidemiologyHarvard School of Public Health Boston Massachusetts 02115 USA
8. Department of MedicineMassachusetts General Hospital Boston Massachusetts 02114 USA