[1] NIADDKD,CELL BIOL & GENET LAB,BLDG 4,ROOM 312,BETHESDA,MD 20205
[2] UNIV E ANGLIA,SCH BIOL SCI,DEPT BIOPHYS,NORWICH NR4 7TJ,NORFOLK,ENGLAND
[3] FREE UNIV BRUSSELS,SCH MED,PHARMACOL LAB,B-1050 BRUSSELS,BELGIUM
[4] FREE UNIV BRUSSELS,SCH MED,EXPTL MED LAB,B-1050 BRUSSELS,BELGIUM