1. Johns Hopkins University, Baltimore, Maryland United States
2. London School of Hygiene and Tropical Medicine, 44 Keppel St, London WC1E 7HT, U.K.
3. School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Drive, Atlanta, Georgia 30332, United States
4. Department of Civil Engineering & Centre for Environmental Science and Engineering, Indian Institute of Technology − Kanpur, India
5. National Environmental Engineering Research Institute (NEERI), Nagpur, India
6. UNICEF − New York, New York United States
7. Sanford School of Public Policy and Duke Global Health Institute, Duke University, Durham, North Carolina United States
8. Institute of Water Policy; National University of Singapore, Singapore