[1] CATHOLIC UNIV LOUVAIN,SCH MED,RENAL SERV,B-1348 LOUVAIN LA NEUVE,BELGIUM
[2] CLIN UNIV ST LUC,DEPT PATHOL,BRUXELLES,BELGIUM
[3] CLIN UNIV ST LUC,RENAL SERV,BRUSSELS,BELGIUM
[4] CATHOLIC UNIV LEUVEN,AKAD ZIEKENHUIS ST RAFAEL,SCH MED,RENAL SERV,B-3000 LOUVAIN,BELGIUM
[5] UNIV LIEGE,B-1070 BRUSSELS,BELGIUM
[6] STATE UNIV GHENT,AKAD ZIEKENHUIS,RENAL SERV,B-9000 GHENT,BELGIUM
[7] UNIV LIEGE,HOP BAVIERE,RENAL HYPERTENS UNIT,FONDS NATL RECH SCI,B-4020 LIEGE,BELGIUM