cLondon School of Hygiene and Tropical Medicine, London, United Kingdom
dInstitute for Hygiene and Public Health, University of Bonn, Germany
eDepartment of Public Health Sciences, G. Sanarelli, Città Universitaria, Rome, Italy
fSulabh International Social Service Organization, Calcutta, India
gDepartment of Public Health, University of Parma, Parma, Italy
hWater Supply and Sanitation Collaborative Council, Geneva, Italy
Address correspondence to Elizabeth Scott, PhD, assistant professor, co-director of Simmons Center for Hygiene and Health in Home and Community, director of Program in Public Health, Department of Biology, Simmons College, 300 The Fenway, Boston, MA 02115.