1. Cancer Risk, Detection, and Interception Program, Duke Cancer Institute, Durham, North Carolina, USA;
2. Department of Population Health Sciences, Duke University, Durham, North Carolina, USA;
3. Department of Pathology, Duke University, Durham, North Carolina, USA;
4. Department of Biostatistics & Bioinformatics, Duke University, Durham, North Carolina, USA;
5. School of Medicine, Duke University, Durham, North Carolina, USA;
6. Department of Medicine, Duke University, Durham, North Carolina, USA;
7. Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina, USA;
8. School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA;
9. Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, Washington, USA;
10. Division of Biostatistics, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.