Affiliation: | 1. Natural Resources Research Institute , University of Minnesota Duluth , 5013 Miller Trunk Highway, Duluth , MN , 55811 , USA;2. School of Statistics , University of Minnesota , 313 Ford Hall, 224 Church Street S. E., Minneapolis , MN , 55455 , USA;3. Computational Toxicology Laboratory, Division of Toxicology , Agency for Toxic Substances and Disease Registry (ATSDR) , Executive Park Building 4, 1600 Clifton Road, E-29, Atlanta , GA , 30333 , USA |