1. Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
2. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
3. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
4. Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
5. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA