1 Feinstein International Center, Friedman School of Nutrition, Tufts University, Boston, Massachusetts, USA.
2 United Nations Children's Fund (UNICEF), New York, New York, USA.
3 Supply Division, UNICEF, Copenhagen, Denmark.
4 Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, Pennsylvania, USA.
5 Department of Community and Population Health, Lehigh University, Bethlehem, Pennsylvania, USA.
6 Office of Technical and Program Quality, U.S. Agency for International Development (USAID) Bureau for Humanitarian Assistance, Washington, District of Columbia, USA.
7 Retired from Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
8 Global WASH Cluster, UNICEF, Geneva, Switzerland.