1. MRC/UVRI, Uganda Research Unit on AIDS, Uganda
2. Department of Health SciencesUniversity of Missouri Columbia, Missouri, USA
3. School of Public HealthUniversity of Sydney, Australia
4. World Health OrganizationStudy on global AGEing and adult health, Geneva, Switzerland
5. Research Centre for Gender, Health and Ageing, University of Newcastle, Australia
6. London School of Hygiene and Tropical MedicineLondon UK