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