1 Washington University School of Medicine in St. Louis, St. Louis, Missouri.
2 Division of Anatomic & Molecular Pathology, Department of Pathology & Immunology, Washington University School of Medicine in St. Louis, St. Louis, Missouri.
3 Department of Surgery, Section of Colon and Rectal Surgery, Washington University School of Medicine in St. Louis, St. Louis, Missouri.
4 Department of Radiation Oncology, Washington University School of Medicine in St. Louis, St. Louis, Missouri.
5 Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, Missouri. Electronic address: davidballard@wustl.edu.
6 Inflammatory Bowel Diseases Center, Division of Gastroenterology and Hepatology, Washington University School of Medicine in St. Louis, St. Louis, Missouri. Electronic address: deepak.parakkal@wustl.edu.