1 Study on global AGEing and adult health, WHO, Geneva, CH-1211, Switzerland; University of Newcastle Priority Research Centre for Gender, Health and Ageing, Newcastle, Australia. Electronic address: kowalp@who.int.
2 International Institute for Population Sciences, Mumbai, India.
3 Academic Unit of Primary Care and Population Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.
4 Indian Institute of Public Health Bhubaneswar, Public Health Foundation of India, New Delhi, India.
5 Department of Anthropology, University of Oregon, Eugene, OR, USA.