1. Faculty of Medicine; MARA University of Technology; Batu Caves Selangor Darul Ehsan Malaysia
2. Division of Geriatric Medicine; Department of Medicine; Faculty of Medicine; University of Malaya; Kuala Lumpur Malaysia
3. Academic Unit of Trauma and Emergency Medicine; Faculty of Medicine; University of Malaya; Kuala Lumpur Malaysia
4. Julius Center University of Malaya; Department of Social and Preventive Medicine; Faculty of Medicine; University of Malaya; Kuala Lumpur Malaysia