1. Centre for Gerontological Nursing, School of Nursing, The Hong Kong Polytechnic University, Hong Kong, China
2. Research Institute for Smart Ageing, The Hong Kong Polytechnic University, Hong Kong, China
3. Social Services Secretary, Sik Sik Yuen, Hong Kong, China
4. School of Nursing, The Hong Kong Polytechnic University, Hong Kong, China
5. Department of Health Sciences, University of Leicester, Leicester, UK