1. Universiti Kebangsaan Malaysia; Department of Family Medicine, Medical Faculty; Cheras Kuala Lumpur Malaysia 53000
2. The University of Nottingham; Division of Epidemiology and Public Health; Clinical Sciences Building Nottingham City Hospital NHS Trust Campus, Hucknall Road Nottingham UK NG5 1PB
3. University of Nottingham; Division of Rehabilitation Medicine; Arkwright House Derby City Hospital Derby UK DE22 3NE
4. Queen Medical Centre, University of Nottingham; Rehabilitation and Ageing, Community Health Sciences; Nottingham UK NG7 2UH
5. University of Glasgow; Academic Section of Geriatric Medicine; Room 34, Level 3 QEB Glasgow Royal Infirmary Glasgow UK G4 0SF
6. University of Nottingham; Stroke Medicine, Division of Rehabilitation and Ageing, School of Community and Health Sciences; Clinical Sciences Building, Floor B Medical School, Queen Medical Centre Nottingham UK NG7 2UH