1. Centre for Rehabilitation and Ageing, Geriatric Medicine, St George’s University of London, London, UK,
2. Centre for Rehabilitation and Ageing, Geriatric Medicine, St George’s University of London, London, UK
3. St George’s NHS Trust, London, UK
4. Sutton and Merton Primary Care Trust, Physiotherapy Department, St Helier Hospital, Carshalton, Surrey, UK
5. Geriatric Medicine, University of Manchester, Hope Hospital, Clinical Sciences Building, Salford, UK