1. Center for Cancer Research, National Cancer Institute; National Institutes of Health; Bethesda Maryland
2. Canadian Wildlife Health Cooperative, Département de pathologie et microbiologie; Faculté de médecine vétérinaire, Université de Montréal; St. Hyacinthe PQ J2S2M2 Canada
3. Groupe de Recherche et d'Education de Mammifères Marins (GREMM); Tadoussac PQ GOT2A0 Canada
4. Fisheries and Oceans Canada; Freshwater Institute; Winnipeg Manitoba R3T 2N6 Canada
5. Marine Mammal Research Unit; University of British Columbia, Animal Health Center; Abbotsford British Columbia V3G 2M3 Canada
6. Sea World San Diego; Sea World Drive, San Diego California
7. John G. Shedd Aquarium, A. Watson Armour III Center for Aquatic Animal Health and Welfare; Chicago Illinois
8. Zoological Pathology Program, College of Veterinary Medicine; University of Illinois at Urbana-Champaign; 3300 Golf Rd, Brookfield Illinois
9. Alaska Veterinary Pathology Services; Eagle River Alaska
10. North Slope Borough, Dept. of Wildlife Management; Utqiagvik Alaska
11. Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks Alaska
12. Wise Laboratory of Genetic and Environmental Toxicology, Department of Pharmacology and Toxicology; University of Louisville School of Medicine; Louisville Kentucky