1. Division of Anatomic Pathology, Department of Pathology, UMassMemorial Health Care, Worcester, Massachusetts.
2. Department of Ophthalmology, Malmö University Hospital, Malmo, Sweden.
3. Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
4. Division of Oncology, University of Massachusetts Medical School, Worcester, Massachusetts.
5. Division of Gastroenterology, Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts.
6. Department of Cancer Biology, University of Massachusetts Medical School, Worcester, Massachusetts.
7. Digestive Disease Division, Department of Medicine, Columbia University Medical School, New York, New York.