1. Departments
of Epidemiology and Biostatistics and Civil and Environmental Engineering, Temple University, 1301 Cecil B. Moore Avenue, Ritter Annex, 9th Floor, Philadelphia, Pennsylvania 19122, United States
2. Public
Health Program, Northern Illinois University, DeKalb, Illinois 60115, United States
3. United Nations University, Tokyo 150-8925, Japan
4. Department
of Microbiology and Molecular Genetics, Michigan State University, East
Lansing, Michigan 48823, United States
5. Department
of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan 48824, United States