1 Professor of Dementia Research, Institute of Mental Health, University of Nottingham, Triumph Road, Nottingham NG7 2TU, UK; Director of Admiral Nursing, Dementia, London, UK. Electronic address: tom.dening@nottingham.ac.uk.
2 Professor of Dementia Research, Institute of Mental Health, University of Nottingham, Triumph Road, Nottingham NG7 2TU, UK; Director of Admiral Nursing, Dementia, London, UK.