1. Department of Applied Social Sciences The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong
2. Institute of Active Ageing (Research Centre for Gerontology and Family Studies) The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong
3. Department of Social Work The Chinese University of Hong Kong Shatin New Territories Hong Kong
4. Department of Sociology Purdue University West Lafayette IN 47907 USA