1. Public Health Program, Department of Population Health Sciences, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, Virginia, USA
2. Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
3. National Center for Rural Water Supply Technical Guidance, Chinese Center for Disease Control and Prevention (CDC), Beijing, China
4. Guangxi CDC, Nanning, Guangxi Autonomous Region, China
5. Henan CDC, Zhengzhou, Henan Province, China
6. School of Public Health, University of California, Berkeley, Berkeley, California, USA
7. Energy and Resources Group, University of California, Berkeley, Berkeley, California, USA
8. Berkeley Water Center, University of California, Berkeley, Berkeley, California, USA