1. Woods Institute for the Environment, Stanford University, Stanford, California United States
2. Civil and Environmental Engineering, Tufts University, Science and Engineering Complex, 200 College Avenue, Medford, Massachusetts United States
3. Division of Epidemiology, School of Public Health, University of California, Berkeley, California United States
4. Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, North Carolina United States
5. Civil and Environmental Engineering, Stanford University, Stanford, California United States
6. Infectious Disease Division, icddr,b Dhaka 1000, Bangladesh
7. Water Global Practice, World Bank, Washington, D.C. 20433, United States
8. Water Global Practice, World Bank, Dhaka 1207, Bangladesh