1. Department of Fish and Wildlife Conservation, Virginia Polytechnic Institute and State University, Blacksburg, Virginia.
2. Virginia Bioinformatics Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia.
3. Department of Computer Science, Virginia Polytechnic Institute and State University, Blacksburg, Virginia.
4. Spatial Epidemiology and Ecology Research Laboratory, University of Florida, Gainesville, Florida.
5. Department of Geography, Emerging Pathogens Institute, University of Florida, Gainesville, Florida.