[1] North Carolina State Univ, Dept Forestry & Environm Resources, Raleigh, NC 27695 USA
[2] Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720 USA
[3] Tufts Univ, Civil & Environm Engn, Medford, MA 02153 USA
[4] Stanford Univ, Civil & Environm Engn, Stanford, CA 94305 USA
[5] Int Ctr Diarrhoeal Dis Res, Infect Dis Div, Dhaka 1212, Bangladesh
[6] World Bank, Water Global Practice, Washington, DC 20433 USA
[7] World Bank, Water Global Practice, Dhaka 1207, Bangladesh
[8] Univ Buffalo, Buffalo, NY 14214 USA
[9] Emory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322 USA
[10] Stanford Univ, Infect Dis & Geog Med, Stanford, CA 94305 USA