1. PSC Support Oxford UK
2. European Reference Network on Hepatological Diseases (ERN RARE‐LIVER)
3. Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine University of Debrecen Debrecen Hungary
4. Department of Surgery, Oncology and Gastroenterology University of Padova Padova Italy
5. Azienda Ospedale – Università Padova Padova Italy
6. Albi, Association pour la Lutte contre les maladies inflammatoires du foie et des voies biliaires Versailles France
7. Department of Medicine Merkur University Hospital Zagreb Croatia
8. School of Medicine University of Zagreb Zagreb Croatia
9. Department of Gastroenterology, Hepatology and Endocrinology Hannover Medical School Hannover Germany
10. Division of Gastroenterology University of Milano‐Bicocca Milan Italy
11. Fondazione IRCCS San Gerardo dei Tintori Monza Italy
12. Liver Disease Unit, Internal Medicine Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
13. Faculty of Medicine University of Coimbra Coimbra Portugal
14. Department of Biomedical Sciences Humanitas University Milan Italy
15. Division of Internal Medicine and Hepatology, Department of Gastroenterology Humanitas Clinical and Research Center IRCCS Rozzano Italy
16. Division for Pediatric Gastroenterology and Hepatology, Department of Pediatric Kidney, Liver, and Metabolic Diseases Hannover Medical School Hannover Germany
17. I. Medizinische Klinik und Poliklinik, and Universitätsklinikum Hamburg Eppendorf Hamburg Germany
18. Martin Zeitz Center for Rare Diseases, University Medical Center Hamburg Eppendorf Hamburg Germany
19. Hamburg Center of Translational Immunology Hamburg Germany
20. Department of Upper Abdominal Diseases Karolinska University Hospital Stockholm Sweden
21. Department of Medicine Huddinge Karolinska Institutet Stockholm Sweden