1. School of Civil & Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
2. Civil & Environmental Engineering, University of Massachusetts, Amherst, Massachusetts 01003, United States
3. Department for International
Development, London, U.K.
4. Department
of Disease Control, London School of Hygiene and Tropical Medicine, London, U.K.
5. Oxford Policy
Management, Oxford, U.K.
6. Civil & Environmental Engineering, University of California Berkeley, Berkeley, California 94720, United States