1. Transplantation and Liver Surgery Clinic; Helsinki University Hospital; Helsinki Finland
2. Institute for Statistical and Epidemiological Cancer Research; Finnish Cancer Registry; Helsinki Finland
3. Faculty of Social Sciences; University of Tampere; Tampere Finland
4. Department of Pediatric Nephrology and Transplantation; Children’s Hospital, Helsinki University Hospital; Helsinki Finland
5. Department of Surgical Gastroenterology and Transplantation, Rigshospitalet; Copenhagen University Hospital; Copenhagen Denmark
6. Danish Cancer Society; Copenhagen Denmark
7. Transplant Institute, Sahlgrenska University Hospital; Gothenburg Sweden
8. Department of Pediatrics, Institute of Clinical Sciences; The Sahlgrenska Academy at University of Gothenburg and Queen Silvia Children’s Hospital; Gothenburg Sweden
9. Division of Transplantation Surgery, Karolinska Institutet, Karolinska University Hospital Huddinge; Stockholm Sweden
10. Department of Pediatrics; Astrid Lindgren’s Children’s Hospital Huddinge, Karolinska University Hospital Huddinge; Stockholm Sweden
11. The Norwegian Cancer Registry; Oslo Norway
12. Department of Transplantation Medicine; Oslo University Hospital; Rikshospitalet Oslo Norway
13. Institute of Clinical Medicine; University of Oslo; Oslo Norway
14. Norwegian PSC Research Center; Department of Transplantation Medicine, Division of Surgery, Inflammatory Diseases and Transplantation; Oslo University Hospital; Oslo Norway
15. Division of Paediatric and Adolescent Medicine; Oslo University Hospital; Oslo Norway
16. Research Institute of Internal Medicine; Oslo University Hospital; Rikshospitalet Oslo Norway