About the Authors
London School of Hygiene & Tropical Medicine, London, United Kingom
Water Institute, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, North Carolina, United States of America
WaterAid, London, United Kingom
UNICEF, New York, New York, United States of America
SC leads a research programme funded by DFID.
ICMJE criteria for authorship read and met: SC JB OC CB. Agree with the manuscript's results and conclusions: SC JB OC CB. Wrote the first draft of the paper: SC JB. Contributed to the writing of the paper: SC JB OC CB. Recruited the other authors: SC.