1. Department of Geriatrics and Stroke, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
2. Faculty of Medicine and Dentistry, University of Sheffield, Sheffield, UK
3. Department of Neurosciences, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
4. Department of Speech and Language Therapy, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
5. Department of Geriatrics, Rotherham General Hospital NHS Foundation Trust, Rotherham, UK