1. Hepatology Division Department of Upper GI Diseases Porphyria Centre SwedenKarolinska Institutet and Karolinska University Hospital Stockholm Sweden
2. Department of Clinical Science, Intervention and Technology (CLINTEC) Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
3. Paul Brousse Hospital University Paris‐SudInserm U935 Villejuif France
4. The Queen Elizabeth University Hospital Birmingham UK
5. Centre Francais des Porphyries Hôpital Louis MourierAssistance Publique‐Hôpitaux de Paris Paris France
6. Department of General Internal Medicine Universitair Ziekenhuis (UZ) Leuven Leuven Belgium
7. Section for Gastroenterology Norwegian Primary Sclerosing Cholangitis (PSC) Research Center Department of Transplantation Medicine Research Institute of Internal Medicine Division of Surgery Inflammatory Diseases and Transplantation Oslo University Hospital Rikshospitalet Hybrid Technology Hub‐Centre of Excellence Institute of Basic Medical Sciences Institute of Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway
8. Department of Nephrology, Dialysis and Internal Diseases Medical University of Warsaw Warsaw Poland
9. Liver Center Munich Department of Medicine II University HospitalLudwig Maximilian University (LMU) Munich Munich Germany
10. Liver Transplant Unit Hospital Clínic de Barcelona Institut d'Investigacions Biomèdiques August Pi i Sunyer Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas Universitat de Barcelona Barcelona Spain
11. Institute of Sanitary and Biomedical Investigation of Alicante Alicante Spain
12. Department of Visceral Transplant Surgery University Medical Center Hamburg‐Eppendorf Hamburg Germany
13. Erasmus MCUniversity Medical Center RotterdamPorphyria Center Rotterdam Rotterdam The Netherlands
14. Department of Medical and Surgical Sciences for Children and Adults University of Modena and Reggio EmiliaUnit of Internal MedicinePoliclinico Hospital of Modena Modena Italy
15. Department of Transplantation and Liver Surgery Helsinki University Hospital Helsinki Finland
16. Liver Transplant Unit, Edouard Herriot Hospital Lyon France
17. Department of General, Visceral, Thoracic, Transplantation and Pediatric Surgery Universitätsklinikum Schleswig‐Holstein (UKSH) Campus Kiel Kiel Germany
18. Department of Visceral Surgery and Medicine Inselspital University Hospital of Bern Bern Switzerland
19. The Liver Unit Addenbrooke's HospitalCambridge University Hospitals Cambridge UK