1. University of Delaware, Department of Animal and Food Sciences, Newark, Delaware, USA
2. University of Delaware, Department of Plant and Soil Sciences, Newark, Delaware, USA
3. Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, Maryland, USA
4. University of Maryland Eastern Shore, Department of Agriculture and Resource Sciences, Princess Anne, Maryland, USA
5. U.S. Department of Agriculture, Agricultural Research Service, Northeast Area, Beltsville Agricultural Research Center, Environmental Microbiology and Food Safety Laboratory, Beltsville, Maryland, USA
6. University of Maryland, Department of Plant Science and Landscape Architecture, College Park, Maryland, USA
7. University of Arizona, Department of Animal and Comparative Biomedical Sciences, Tucson, Arizona, USA
8. University of California, San Diego, Department of Pediatrics, La Jolla, California, USA