1. Rollins School of Public Health, Emory University; Department of Environmental Health; 1518 Clifton Road NE Atlanta GA USA 30322
2. Liverpool School of Tropical Medicine; Department of Clinical Sciences; Pembroke Place Liverpool UK L3 5QA
3. London School of Hygiene & Tropical Medicine; Faculty of Infectious and Tropical Diseases; London UK
4. Aquaya Institute; Nairobi Kenya
5. Rollins School of Public Health, Emory University; Department of Biostatistics and Bioinformatics; 1518 Clifton Road NE Atlanta GA USA 30322
6. London School of Hygiene & Tropical Medicine; Department of Disease Control, Faculty of Infectious and Tropical Diseases; Keppel Street London UK WC1E 7HT