1. Environmental Safety, Bayer CropScience, 2 T. W. Alexander Drive, Durham, North Carolina 27709, United States
2. Global Research and Development, Dow AgroSciences, 9330 Zionsville Road, Buildingg 308-2A, Indianapolis, Indiana 46268 United States
3. Henry A. Wallace Beltsville
Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture, , 10300 Baltimore Ave., Beltsville, Maryland 27519, United States
4. Department of Environmental
Toxicology, University of California at Davis, 4143 Meyer Hall, Davis, California 95616, United States