1. London School of Hygiene & Tropical Medicine; Department of Population Health; Keppel Street London UK WC1E 7HT
2. London School of Hygiene & Tropical Medicine; Environmental Health Group; Keppel St London UK WC1E 7HT
3. London School of Hygiene & Tropical Medicine; Department of Disease Control; Keppel Street London UK WC1E 7HT
4. Shanghai Institute of Planned Parenthood Research (SIPPR); Centre for Clinical Research and Training; 2140 Xie Tu Road Shanghai China 200032
5. WaterAid; Policy and Campaigns; 47-49 Durham Street London UK
6. WaterAid; Technical Support Unit; 47-49 Durham Street London UK SE11 5JD
7. London School of Hygiene & Tropical Medicine; Medical Statistics Department; Keppel St London UK WC1E 7HT