Bain, Robert http://orcid.org/0000-0001-6577-2923
Johnston, Rick http://orcid.org/0000-0003-1711-412X
Slaymaker, Tom
Article History
Received: 12 August 2020
Accepted: 12 August 2020
First Online: 24 August 2020
Competing interests
: The authors are members of the WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene.