1. Department of Medicine I; University of Erlangen; Erlangen Germany
2. Institute of Pathology; Klinikum Bayreuth; Bayreuth Germany
3. Department of Radiation Oncology; UMC Utrecht; Utrecht the Netherlands
4. Trinity Academic Gastroenterology Group; Tallaght Hospital; Dublin Ireland
5. Departments of Surgery and Gastroenterolgy; University Medical Center Utrecht; Utrecht the Netherlands
6. Department of Gastrointestinal Radiology; University of Pennsylvania Medical Center; Philadelphia Pennsylvania
7. Department of Radiology; Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania
8. Department of Radiology; Medical University of Vienna; Vienna Austria
9. Department of Gastroenterology; CHU Bordeaux, Saint Andre Hospital; Bordeaux France
10. Department of Internal Medicine; University of Genoa; Genoa Italy
11. Department of Surgical; Oncological and Gastroenterological Sciences; University of Padua; Padua Italy
12. Division of Gastroenterology, Hepatology and Endoscopy; Brigham and Women's Hospital; Harvard Medical School; Boston Massachusetts