[1] UNIV LONDON ST GEORGES HOSP,SCH MED,DEPT GEN PRACTICE & PRIMARY CARE,LONDON SW17 0RE,ENGLAND
[2] UNIV COLL & MIDDLESEX SCH MED,ACAD DEPT PSYCHIAT,MED SOCIOL UNIT,LONDON,ENGLAND
[3] ST HELIER NHS TRUST,DEPT MED ELDERLY,LONDON,ENGLAND
[4] UNIV LONDON KINGS COLL,CTR MANAGEMENT,LONDON,ENGLAND