1. Gerontology, Iowa State University, Ames, Iowa, USA
2. College of Law and Political Science, Institute of Climate Change and Public Policy, Nanjing University of Information Science and Technology, Institute of Climate Change and Public Policy, Nanjing, Jiangsu, People’s Republic of China
3. School of Social and Behavioural Sciences, Nanjing University, Nanjing, People’s Republic of China
4. Department of Political Science, Iowa State University, Ames, Iowa, USA
5. School of Health Policy and Management, Nanjing Medical University, Nanjing, Jiangsu, China