[1] UNIV MANCHESTER, DEPT PHYSIOL, MANCHESTER M13 9PT, LANCS, ENGLAND
[2] NEWCASTLE GEN HOSP, DEPT NEUROPATHOL, NEWCASTLE UPON TYNE NE4 6BE, TYNE & WEAR, ENGLAND
[3] NEWCASTLE GEN HOSP, MRC, NEUROENDOCRINOL UNIT, NEWCASTLE UPON TYNE NE4 6BE, TYNE & WEAR, ENGLAND