1. Department of Social Work, School of Sociology and Population Studies, Renmin University of China, Beijing, China
2. Department of Social Work and Social Administration, Sau Po Centre on Ageing, University of Hong Kong, Hong Kong,
3. Center for Aging and Health Research, Institute for Population and Development Studies, School of Public Policy and Administration, Xi’an Jiaotong University, Xi’an, China
4. School of Social Work, University of Southern California, Los Angeles, CA, USA