1. University of Florida, College of Veterinary Medicine, Department of Comparative, Diagnostic, and Population Medicine, 2015 SW 16th Avenue, Gainesville, Florida 32608, USA
2. The Marine Mammal Center, 2000 Bunker Road, Sausalito, California 94965, USA
3. Zoological Pathology Program, College of Veterinary Medicine, University of Illinois at Urbana–Champaign, 3300 Golf Road, Brookfield, Illinois 60513, USA
4. Sea Mammal Research Unit, Scottish Oceans Institute, University of St. Andrews, St. Andrews KY16 8LB, UK