KU Leuven - Department of Microbiology, Immunology and Transplantation, Imperial College, Faculty Medicine, Dept Immunology and Inflammation, Mayo Clinic - Department of Laboratory Medicine and Pathology, Cedars-Sinai Medical Center - Department of Pathology and Laboratory Medicine, University of Nebraska Medical Center - Division of Nephrology, University of Texas Medical Branch-Galveston - Department of Pathology, Yeshiva University - Montefiore Medical Center, Johns Hopkins University - Department of Medicine, Mayo Clinic, Johns Hopkins University - Department of Pathology, Columbia University - Department of Pathology, Medical University of Vienna - Division of Nephrology and Dialysis, RWTH Aachen University Hospital - Institute of Pathology, University of Gothenburg - Department of Clinical Pathology, University of Chicago, Erasmus University Rotterdam (EUR) - Department of Clinical Bioinformatics, Arkana Laboratories - Department of Transplant Translational Research, Harvard University - Massachusetts General Hospital, Weill Cornell Medical College - Division of Nephrology and Hypertension, - Department of Pathology, Assistance Publique-Hopitaux de Paris (AP-HP), Emory University - Department of Pathology and Laboratory Medicine, Vanderbilt University - Department of Pathology, Microbiology and Immunology, The Voice of the Patient, University of Manitoba - Department of Pathology, Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC), Cedars-Sinai Medical Center - Division of Nephrology, Columbia University - Division of Nephrology, Duke University - Medical Center, Leiden University, Medical Center (LUMC), Department of Pathology, Medical University of Vienna - Department of Urology, Medical University of Vienna - Department of Pathology, Oregon Health and Science University, Ludwig Maximillian University Munich - Nephrology Center, University of Paris - Saint Louis Hospital, Weill Cornell Medical College - Division of Nephrology and Hypertension, Westmead Hospital - Department of Renal Medicine, University Hospitals Birmingham NHS Foundation Trust, University of Pittsburgh - Thomas E. Starzl Transplant Institute, Necker-Enfants Malades Hospital - Department of Pathology, Harvard University - Massachusetts General Hospital, Harvard University - Massachusetts General Hospital, University of Montreal - Maisonneuve-Rosemont Hospital, McGill University - Division of Nephrology & Multi-Organ Transplant Program, University Hospital Zurich, Mayo Clinic - Division of Nephrology and Hypertension, Weill Cornell Medical College - Division of Renal Pathology, University Hospitals Birmingham NHS Foundation Trust, University of Alberta - Department of Laboratory Medicine and Pathology, University of Claude Bernard Lyon 1 - CIRI, Radboud University Nijmegen - Radboud University Medical Center, Hospital Clinic of Barcelona - Nephrology Department, Imperial College London, Université Paris Cité - Department of Nephrology and Transplantation, Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC) and University of Alberta - Department of Laboratory Medicine and Pathology

Imperial College, Faculty Medicine, Dept Immunology and Inflammation, KU Leuven - Department of Microbiology, Immunology and Transplantation, Harvard University - Massachusetts General Hospital, Cedars-Sinai Medical Center - Department of Pathology and Laboratory Medicine, Université Paris Cité - Department of Nephrology and Transplantation, University of Nebraska Medical Center - Division of Nephrology, University of Texas Medical Branch-Galveston - Department of Pathology, Johns Hopkins University - Department of Medicine, Assistance Publique-Hôpitaux de Paris - Department of Kidney Transplantation, Johns Hopkins University - Department of Pathology, Columbia University - Department of Pathology, University of Edinburgh - Centre for Inflammation Research, University of Gothenburg - Department of Clinical Pathology, Charité - Universitätsmedizin Berlin - Department of Nephrology and Medical Intensive Care, Erasmus University Rotterdam (EUR) - Department of Clinical Bioinformatics, Arkana Laboratories - Department of Transplant Translational Research, Mayo Clinic - Department of Laboratory Medicine and Pathology, Weill Cornell Medical College - Division of Nephrology and Hypertension, University of Pittsburgh - Department of Hepatic and Transplantation Pathology, University of Göttingen - Department of Nephrology and Rheumatology, Emory University - Department of Pathology and Laboratory Medicine, Vanderbilt University - Department of Pathology, Microbiology and Immunology, Northwestern University - Feinberg School of Medicine, University of Manitoba - Department of Pathology, Guy's and St Thomas' NHS Foundation Trust, Columbia University - Division of Nephrology, Cedars-Sinai Medical Center - Division of Nephrology, Duke University - Medical Center, Leiden University, Medical Center (LUMC), Department of Pathology, Medical University of Vienna - Department of Urology, Critical Path Institute (C-Path), Medical University of Vienna - Department of Pathology, Ludwig Maximillian University Munich - Nephrology Center, New York University (NYU) - NYU Langone Transplant Institute, NYU Langone Transplant Institute, Westmead Hospital - Department of Renal Medicine, University Hospitals Birmingham NHS Foundation Trust, University of Manitoba - Department of Immunology, Necker-Enfants Malades Hospital - Department of Pathology, University of Pittsburgh - Thomas E. Starzl Transplant Institute, Harvard University - Massachusetts General Hospital, Harvard University - Massachusetts General Hospital, University of Montreal - Maisonneuve-Rosemont Hospital, McGill University - Division of Nephrology & Multi-Organ Transplant Program, University of Florida - Department of Medicine-Quantitative Health, University of San Francisco, Mayo Clinic - Division of Nephrology and Hypertension, Mayo Clinic - Division of Transplantation Surgery, University of Alberta - Department of Laboratory Medicine and Pathology, Radboud University Nijmegen - Radboud University Medical Center, University of Manitoba - Department of Immunology, Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC) and University of Alberta - Department of Laboratory Medicine and Pathology

University of Cambridge - Department of Surgery, University College London - University College London Medical School, University Hospitals Birmingham NHS Foundation Trust, University of Birmingham, NHS Blood and Transplant Clinical Trials Unit, NHS Blood and Transplant Clinical Trials Unit, NHS Blood and Transplant Clinical Trials Unit, NHS Blood and Transplant Clinical Trials Unit, NHS Blood and Transplant Clinical Trials Unit, Intensive Care National Audit and Research Centre, NHS Blood and Transplant Clinical Trials Unit, NHS Blood and Transplant Clinical Trials Unit, NHS Foundation Trust - Cambridge University Hospitals, NHS Foundation Trust - Cambridge University Hospitals, NHS Foundation Trust - Cambridge University Hospitals, Guy’s and St Thomas’ NHS Foundation Trust, University of Birmingham, Imperial College, Faculty Medicine, Dept Immunology and Inflammation, Guy’s and St Thomas’ NHS Foundation Trust, Government of the United Kingdom - Barts Health NHS Trust, Government of the United Kingdom - Portsmouth Hospitals University NHS Trust, University of Birmingham, NHS Foundation Trust - Cambridge University Hospitals, University Hospitals Coventry and Warwickshire, Government of the United Kingdom - North Bristol NHS Trust, Guy’s and St Thomas’ NHS Foundation Trust, Independent, Imperial College London, Nottingham University Hospitals NHS Trust, University Hospitals of Leicester NHS Trust, Newcastle University, Liverpool University Hospitals NHS Foundation Trust, Leeds Teaching Hospitals NHS Trust, Leeds Teaching Hospitals NHS Trust, University Hospitals Birmingham NHS Foundation Trust, University of Oxford - Nuffield Department of Surgical Sciences, Royal Infirmary of Edinburgh, University of Edinburgh, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, Cardiff and Vale University Health Board, University of Oxford - Nuffield Department of Surgical Sciences, Government of the United Kingdom - Queen Elizabeth University Hospital, Government of the United Kingdom - Queen Elizabeth University Hospital, Government of the United Kingdom - North Bristol NHS Trust, The University of Manchester - Manchester University NHS Foundation Trust, St George's University Hospitals NHS Foundation Trust, Government of the United Kingdom - Barts Health NHS Trust, University College London, NHS Foundation Trust - Cambridge University Hospitals, Royal Free London NHS Foundation Trust, Government of the United Kingdom - Portsmouth Hospitals University NHS Trust, Government of the United Kingdom - Portsmouth Hospitals University NHS Trust, University Hospitals Plymouth NHS Trust, University Hospitals Plymouth NHS Trust, Sheffield Teaching Hospitals NHS Foundation Trust, University of Sheffield, University of Sheffield and University of Cambridge - Addenbrooke's Hospital

University of Padua - Department of Cardiac, Thoracic, and Vascular Sciences, Stanford University - Department of Pathology, Sorbonne University - Department of Cardiac Surgery, University of California, Los Angeles (UCLA) - UCLA Immunogenetics Center, Washington University in St. Louis School of Medicine, Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC), Cedars-Sinai Medical Center - Smidt Heart Institute, Hospices Civils de Lyon - Department of Transplantation Nephrology and Clinical Immunology, Papworth Hosptial - The Cardiothoracic Transplant Unit, University of Padua - Department of Cardiac, Thoracic, and Vascular Sciences, University Hospitals Birmingham NHS Foundation Trust, Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC), Necker-Enfants Malades Hospital, Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC) and Intermountain Cental Laboratory

University-Hospital of Padova, University of Edinburgh - Centre for Inflammation Research, Cleveland Clinic, University of California, San Francisco (UCSF) - Department of Surgery, University of Minnesota - Minneapolis - Department of Pathology, University of Texas, Mount Sinai Hospital, New York - Recanati/Miller Transplantation Institute, Mount Sinai Medical Center, University Hospitals Birmingham NHS Foundation Trust, Government of New South Wales - NSW Government Health, North Sydney, University of Pittsburgh - Department of Pathology, Centenary Institute, Hospital of Paris, Diagnostic Pathology, Kyoto University Hospital, University of Toronto - University Health Network, University of Ege - Department of Pathology, Mayo Clinic - Arizona - Department of Pathology, University of Pittsburgh - Department of Hepatic and Transplantation Pathology, King’s College London - Liver Histopathology Laboratory, Heidelberg University - Institute of Pathology, University Hospital Birmingham, St Vincent’s University Hospital (Ireland), Paris Expertise Centre for Organ Transplantation at Paris Cardiovascular Research Center (PARCC), Houston Methodist Research Institute - Department of Pathology and Genomic Medicine, Erasmus University Rotterdam (EUR) - Department of Pathology, Hannover Medical School, University of Genova - Department of Surgical Science and Integrated Diagnostics (DISC), University of Oslo - Oslo University Hospital, Rikshospitalet, University of Toronto - Department of Paediatrics, Catholic University of Louvain (UCL) - Institut de Recherche Experimentale et Clinique (IREC), affiliation not provided to SSRN, Duke University, School of Medicine, Department of Pathology, University of Oslo - Oslo University Hospital, affiliation not provided to SSRN, University of Texas Medical Branch-Galveston, Mayo Clinic - Division of Transplantation Surgery, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo. HC-FMUSP, Hannover Medical School and Kyoto University - Department of Pediatrics

University of Edinburgh - Centre for Inflammation Research, University of Texas, University of Minnesota - Minneapolis - Department of Pathology, Alexandria University - Faculty of Medicine, Columbia University - Department of Pathology, Mount Sinai Hospital, New York, Université de Toulouse - CHU de Toulouse, Cleveland Clinic, Ain Shams University, Emory University - Department of Pathology and Laboratory Medicine, University of California, San Francisco (UCSF) - Department of Surgery, Icahn School of Medicine at Mount Sinai - Department of Oncological Sciences, University of Toronto - Department of Laboratory Medicine and Pathobiology, University of Chicago - Department of Surgery, University of Oslo - Oslo University Hospital, Rikshospitalet, Cleveland Clinic, Diagnostic Pathology, Kyoto University Hospital, University of Chicago - Department of Pathology, Duke University - Medical Center, University of Toronto - University Health Network, University of Pittsburgh - Department of Pathology, University of Chicago - Department of Pathology, University of Pittsburgh - Department of Pathology, Northwestern University - Feinberg School of Medicine, Centenary Institute, Government of New South Wales - NSW Government Health, North Sydney, University-Hospital of Padova, King’s College London - Liver Histopathology Laboratory, University of Pittsburgh - Department of Pathology, Harvard University - Beth Israel Deaconess Medical Center, University Hospitals Birmingham NHS Foundation Trust, University of Kansas - University of Kansas Medical Center, Mount Sinai Hospital, New York - Recanati/Miller Transplantation Institute, Mount Sinai Medical Center, Hadassah-Hebrew University Medical Center, University of Pittsburgh - Department of Pathology, University of Miami - Department of Surgery, King’s College London - Institute of Liver Studies, Hannover Medical School, Hospital of Paris, Mayo Clinic - Arizona - Department of Pathology, University of Texas Medical Branch-Galveston, Mayo Clinic - Division of Transplantation Surgery, Hannover Medical School, Mount Sinai Health System - Department of Pathology, Institute for Clinical and Experimental Medicine (IKEM), University of California, Los Angeles (UCLA) - Department of Pathology, University of Pittsburgh - Department of Pathology, University of Ege - Department of Pathology, King’s College London - Liver Histopathology Laboratory, University of Pittsburgh - Medical Center (UPMC) and University of Pittsburgh - Department of Hepatic and Transplantation Pathology

University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University of Warwick - Warwick Medical School, University of Warwick - Warwick Medical School, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, Belfast Health and Social Care Trust, Belfast Health and Social Care Trust, Belfast Health and Social Care Trust, Belfast Health and Social Care Trust, Queen's University Belfast, Nottingham University Hospitals NHS Trust, University of Nottingham, University of Nottingham, University of Nottingham, Northern Lincolnshire and Goole NHS Foundation Trust, John Radcliffe Hospital - Department of Cellular Pathology, Government of the United Kingdom - Oxford University Hospitals NHS Foundation Trust, University Hospitals Birmingham NHS Foundation Trust, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University Hospitals Coventry and Warwickshire, University of Warwick - Warwick Medical School, University Hospitals Coventry and Warwickshire, University of Warwick - Warwick Medical School, University of Warwick - Warwick Medical School and University Hospitals Coventry and Warwickshire