1. Division of Gastroenterology Department of Medicine Duke University Durham NC USA
2. Duke Molecular Physiology Institute Duke University Durham NC USA
3. Public Health Sciences Division Fred Hutchinson Cancer Research Center Seattle WA USA
4. Division of Endocrinology Department of Medicine Duke University Durham NC USA
5. Department of Medicine Durham Veterans Affairs Medical Center Durham NC USA
6. Department of Biostatistics and Bioinformatics Duke University Durham NC USA
7. Department of Pathology Duke University Durham NC USA