1. One Health Institute, School of Veterinary Medicine, University of California, 1 Shields Avenue, Davis, California 95616, USA
2. Current address: Vanderbilt Institute for Global Health, Vanderbilt University, 2525 W End Avenue, Suite 750, Nashville, Tennessee 37203, USA
3. Zoological Pathology Program, University of Illinois at Urbana-Champaign, College of Veterinary Medicine, LUMC Rm. 0745 Bldg. 101, 2160 S First Avenue, Maywood, Illinois 60153, USA
4. The Marine Mammal Center, Marin Headlands, 2000 Bunker Road, Fort Cronkhite, Sausalito, California 94965, USA
5. Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, 1 Shields Avenue, University of California, Davis, California 95616, USA