1. Department of Gastroenterology & Hepatology and Tytgat Institute for Liver and Intestinal Research, Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
2. Department of Gastroenterology; Università Politecnica delle Marche; Ancona Italy
3. Department of Medicine II; University of Munich (LMU); Munich Germany
4. Department of Radiology; Academic Medical Center; Amsterdam The Netherlands
5. Department of Pathology; Academic Medical Center; Amsterdam The Netherlands
6. Norwegian PSC Research Center and Section for Gastroenterology; Department of Transplantation Medicine, Division of Cancer Medicine, Surgery and Transplantation, Oslo University Hospital; Rikshospitalet Oslo Norway