[1] UNIV MILAN,IST CLIN MED GEN & TERAPIA MED,CTR AUXOL ITALIANO,I-20122 MILAN,ITALY
[2] OSPED MAGGIORE,CTR FISOL CLIN & IPERTENSIONE,MILAN,ITALY
[3] UNIV AMSTERDAM,ACAD MED CTR,DEPT PHARMACOTHERAPY,1105 AZ AMSTERDAM,NETHERLANDS
[4] UNIV AMSTERDAM,ACAD MED CTR,DEPT CARDIOL,1105 AZ AMSTERDAM,NETHERLANDS
[5] FREE UNIV BERLIN,KLINIKUM STEGLITZ,DIV NEPHROL,W-1000 BERLIN 45,GERMANY
[6] BYK GULDEN,DEPT MED,MILAN,ITALY
[7] BYK GULDEN,DEPT MED,KONSTAN,GERMANY