1. World Health Organization, avenue Appia 20, 1211 Geneva 27, Switzerland.
2. Ageing and Development Programme, African Population and Health Research Center, Nairobi, Kenya.
3. Graduate School of Medicine, Jutendo University, Tokyo, Japan.
4. Gérontopôle, Centre Hospitalier Universitaire de Toulouse, Toulouse, France.
5. Instituto Nacional de Geriatría de México, Mexico City, Mexico.
6. Division of Geriatrics and Endocrinology, St Louis University, St Louis, United States of America.
7. Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium.
8. International Federation on Ageing, Toronto, Canada.
9. Department of International Health and Collaboration, National Institute of Public Health, Saitama, Japan.