[1] NEWCASTLE GEN HOSP,MRC,NEUROENDOCRINOL UNIT,NEWCASTLE TYNE NE4 6BE,TYNE & WEAR,ENGLAND
[2] UNIV SYDNEY,DEPT PHARMACOL,SYDNEY,NSW 2006,AUSTRALIA
[3] ST MARYS HOSP,SCH MED,DEPT BIOCHEM,LONDON,ENGLAND
[4] HEXHAM GEN HOSP,DEPT PATHOL,HEXHAM,NORTHD,ENGLAND