1. National Research Council, Neuroscience Institute, Padova, Italy
2. World Health Organization Study on global AGEing and adult health (SAGE), Geneva, Switzerland
3. Surveys, Measurement and Analysis Unit, Department of Information, Evidence and Research, World Health Organization, Geneva, Switzerland
4. Chiang Mai University Research Institute for Health Sciences (CMU-RIHES), Chiang Mai, Thailand
5. Research Centre for Generational Health and Ageing, University of Newcastle, Callaghan, NSW, Australia