1. Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
2. Planetary Health Alliance, Harvard University, Cambridge, Massachusetts, USA
3. Department of Demography, University of California, Berkeley, Berkeley, California, USA
4. International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
5. Department of Ecology and Evolution, University of Chicago, Chicago, Illinois, USA