[1] Sligo Mental Hlth Serv, Sligo, Ireland
[2] Univ Limerick, CIRG, Grad Entry Med Sch, Limerick, Ireland
[3] Oxleas NHS Trust, London, England
[4] Guys & St Thomas NHS Fdn Trust, St Thomas Hosp, Elderly Care Unit, London, England
[5] Kings Coll London, Inst Psychiat, HSPR Dept, London WC2R 2LS, England