1. Centre for Gerontological Nursing, School of Nursing, The Hong Kong Polytechnic University , Kowloon, Hong Kong SAR , China
2. College of Nursing, University of the Philippines Manila , Manila , Philippines
3. Division of Psychiatry, University of College London , London , UK
4. Ming Yue District Elderly Community Centre, Hong Kong Young Women’s Christian Association , Hong Kong SAR , China
5. Hong Kong Young Women’s Christian Association , Hong Kong SAR , China