1. Colorado State University Veterinary Diagnostic Laboratory, 300 West Drake Ave., Fort Collins, Colorado 80523, USA
2. Wildlife Health Center, TB128 Old Davis Road, School Veterinary Medicine, University of California, Davis, California 95616, USA
3. Wyoming State Veterinary Laboratory, 1174 Snowy Range Road, Department Veterinary Sciences, University of Wyoming, Laramie, Wyoming 82070, USA
4. National Oceanic and Atmospheric Administration, Alaska Fisheries Science Center, National Marine Mammal Laboratory, Alaska Ecosystems Program, 7600 Sand Point Way NE, Seattle, Washington 98115, USA