1. Department of Environmental Engineering, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia.
2. Center for Global Safe Water, Sanitation, and Hygiene, Rollins School of Public Health, Atlanta, Georgia.
3. Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, Georgia.
4. Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, Georgia.
5. Wellcome Research Laboratory, Christian Medical College, Vellore, India.
6. Department of Community Health, Christian Medical College, Vellore, India.