Fred Hutchinson Cancer Research Center - Clinical Research Division, University of Oslo - Department of Pathology, Cedars Sinai Medical Center, University of Oslo - Department of Pathology, University of Oslo - Department of Transplantation Medicine, F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, University of Oslo - Oslo University Hospital, Fred Hutchinson Cancer Research Center - Clinical Research Division, Virginia Mason Medical Center, Cedars Sinai Medical Center - F. Widjaja IBIRI Institute, University of Oslo - Oslo University Hospital, University of Oslo - Department of Pathology, Fred Hutchinson Cancer Research Center - Clinical Research Division and University of Oslo - Department of Hematology