1. Alaska Veterinary Pathology Services, PO Box 773072 Eagle River, Alaska, 99577 USA
2. Alaska Department of Fish and Game, Division of Wildlife Conservation, 1300 College Rd., Fairbanks, Alaska 99701, USA
3. Alaska Department of Fish and Game, Division of Wildlife Conservation, Marine Mammals Section, 525 W 67th Ave., Anchorage, Alaska, 99518 USA
4. Florida Department of Agriculture and Consumer Services, Kissimmee Diagnostic Laboratory, Kissimmee, Florida 34741, USA
5. Department of Pathobiology, College of Veterinary Medicine, University of Florida, 2015 SW 16th Ave., Gainesville, Florida 32610, USA