From INSERM UMR-1048, Toulouse, France (S.G., M. Trayssac, N.A., J.T., D.C., M. Thomsen, A.N.-S., R.S.); Faculty of Medicine, Department of Biochemistry, University of Toulouse, Toulouse, France (S.G., M. Trayssac, J.T., N.K., L.R., R.S.); Roche Diagnostics GmbH, Penzberg, Germany (H.K.); CHU Rangueil, Department of Nephrology, Toulouse, France (F.S., N.K., L.R.); and INSERM UMR-1027, Toulouse, France (M. Thomsen). (At 2011-12-13)