1. Stroke Research Group; Norfolk and Norwich University Hospital
2. Norwich Medical School; Faculty of Medicine and Health Sciences; University of East Anglia; Norwich; Norfolk; UK
3. Stroke Research Group; Institute for Ageing and Health; Newcastle University; Royal Victoria Infirmary; Newcastle; UK
4. Department of Medicine for the Elderly; University Hospital Aintree; Liverpool; UK
5. Freeman Hospital Stroke Service; Newcastle Hospitals National Health Service Trust; Newcastle upon Tyne; UK