1. From the Paris Translational Research Center for Organ Transplantation, INSERM, Unité Mixte de Recherche S970 (A.L., C.L.), the Kidney Transplant Department, Necker Hospital, Assistance Publique–Hôpitaux de Paris (AP-HP) (A.L.), and the Kidney Transplant Department, Saint-Louis Hospital, AP-HP (C.L.) — all in Paris.