1. PSSRU, Manchester University, UK,
2. Penn Hospital, Wolverhampton, UK and Centre for Ageing and Mental Health, Staffordshire University, Stafford, UK,
3. Penn Hospital, Penn Road, Wolverhampton, UK
4. Leighton Hospital, Middlewich Road, Crewe, UK
5. Centre for Ageing and Mental Health, Staffordshire University, Stafford, UK
6. Centre for Ageing and Mental Health, Staffordshire University, Stafford, UK,