1 Centre for Liver Research and NIHR Biomedical Research Unit, University of Birmingham, Birmingham, UK. Electronic address: g.hirschfield@bham.ac.uk.
2 Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Cancer Medicine, Surgery and Transplantation, Oslo University Hospital, Rikshospitalet and Institute of Clinical Medicine, Faculty of Medicine, University of Oslo and K.G. Jebsen Inflammation Research Centre, Research Institute of Internal Medicine, Oslo University Hospital, Oslo, Norway.