1. Department of Epidemiology and Public Health, Yale School of Medicine, New Haven, Connecticut.
2. Department Pediatrics, Division of Emergency Medicine, Harvard Medical School, Children's Hospital Boston, Boston, Massachusetts.
3. Knipling-Bushland U.S. Livestock Insects Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Kerrville, Texas.
4. Fordham University, Louis Calder Ecology Center, Armonk, New York.
5. Connecticut Agricultural Experiment Station, New Haven, Connecticut.
6. Terry L. Schulze, Ph.D., Inc., Perrineville, New Jersey.
7. Department of Plant Sciences, University of Rhode Island, Kingston, Rhode Island.
8. Livestock and Poultry Sciences Institute, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland.