1. Doctoral Student Department of Global Health and Population, Harvard T.H. Chan School of Public Health Boston USA
2. Research AssociateDepartment of Global Health and Population, Harvard T.H. Chan School of Public Health Boston USA
3. Principal Research ScientistDepartment of Global Health and Population, Harvard T.H. Chan School of Public Health Boston USA
4. Richard Saltonstall Professor of Population Sciences and Professor of Economics and International Health, Department of Global Health and Population Harvard T.H. Chan School of Public Health 655 Huntington Ave Boston, MA 02115 USA