1. From the INSERM Unit 507 (O.P., O.I., T.N.-K., N.M., I.E.N., T.B.D.) and Laboratory of Biochemistry A (T.N.-K., B.L.), Necker Hospital, Paris, France; Centre de Morphologie Mathématique, Ecole des Mines de Paris, Fontainebleau, France (J.A.); Department of Nephrology and Immunology, University Hospital Aachen, Aachen, Germany (R.W., M.K.); Nephrology Section, Department of Internal Medicine, University Hospital, Gent, Belgium (N.M., R.V.); and INSERM ERI-12, Amiens, France, Sud University of...