1. Division of Oncology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
2. Prometheus Laboratories Inc., San Diego, CA, USA
3. Department of Surgery, Division of Public Health Sciences, Washington University School of Medicine, St. Louis, MO, USA
4. Division of Gastroenterology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
5. Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
6. NorthShore University HealthSystem, Evanston, IL, USA
7. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA