1. Paris Translational Research Center for Organ Transplantation, INSERM, UMR-S970, Paris, France
2. Department of Medicine, Renal-Electrolyte and Hypertension Division, University of Pennsylvania, Philadelphia
3. Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia
4. Department of Kidney Transplantation, Necker Hospital, Assistance Publique - Hôpitaux de Paris, Paris, France