1 Department of Nephrology and Transplantation, Centre Hospitalier Universitaire de Poitiers and Centre national de référence maladies rares: amylose AL et autres maladies à depots d'immunoglobulines monoclonales, Université de Poitiers, Poitiers, France.
2 Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA.
3 Department of Hematology and Immunology, University Hospital St Louis, Paris, France.
4 Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA.