[1] ROYAL EDINBURGH & ASSOC HOSP, MRC, BRAIN METAB UNIT, MORNINGSIDE PK, EDINBURGH EH10 5HF, SCOTLAND
[2] ROYAL CORNHILL HOSP, ABERDEEN, SCOTLAND
[3] LOTHIAN HLTH BOARD, EDINBURGH, SCOTLAND
[4] UNIV ABERDEEN, DEPT PSYCHOL, ABERDEEN AB9 1FX, SCOTLAND
[5] UNIV ABERDEEN, DEPT MENTAL HLTH, ABERDEEN AB9 1FX, SCOTLAND