1. Department of Biology, 1600 Holloway Avenue, San Francisco State University, San Francisco, California 94132.
2. California State Polytechnic University Pomona, 3801 West Temple Avenue, Pomona, California 91768.
3. Department of Medicine and Epidemiology, School of Veterinary Medicine, 1 Shields Avenue, University of California, Davis, California 95616.
4. Wildlife Genomics and Disease Ecology Laboratory, Department of Veterinary Sciences and Program in Ecology, University of Wyoming, Laramie, Wyoming 82071.