[1] UNIV BRISTOL,SCH MED,DEPT PHARMACOL,BRISTOL BS8 1TD,AVON,ENGLAND
[2] UNIV BRISTOL,DEPT MED,BRISTOL BS8 1TD,AVON,ENGLAND
[3] BRISTOL GEN HOSP,DEPT GERIATR MED,BRISTOL BS1 6SY,AVON,ENGLAND
[4] BRISTOL GEN HOSP,DEPT MED PHYS,BRISTOL BS1 6SY,AVON,ENGLAND