1. Digestive Endoscopy Unit, Catholic University, Rome, Italy
2. Department of Radiology, Academic Medical Center, University of Amsterdam, The Netherlands
3. Department of Gastroenterology, Hospital Universitario de Canarias, Facultad de Medicina, Universidad de La Laguna, La Laguna, Tenerife, Spain
4. Department of Radiological Sciences, Oncology and Pathology, Sapienza University of Rome; I.C.O.T. Hospital, Latina, Italy
5. Department of Health Economy and Health Management, University of Oslo, and Department of Transplantation Medicine, Gastroenterology Unit, Oslo University Hospital, Oslo, Norway
6. Gedyt Endoscopy Center, Buenos Aires, Argentina
7. Department of Internal Medicine III, Division of Gastroenterology and Hepatology, Medical University of Vienna, Vienna, Austria
8. Centre for Medical Imaging, University College London, London, UK
9. Department of Radiology, Sahlgrenska University Hospital and Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
10. Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
11. Virtual Colonoscopy Teaching Centre, Hooglede, Belgium, and AZ Delta, Roeselare, Belgium
12. Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
13. Diagnostic and Interventional Radiology, University of Pisa, Pisa, Italy
14. Institute for Cancer Research and Treatment, Candiolo-Torino, Italy