1. Department of Medicine and Epidemiology; School of Veterinary Medicine; University of California; Davis CA 95616 USA
2. Department of Wildlife Biology; Humboldt State University; Arcata CA 95521 USA
3. Department of Population, Health and Reproduction; School of Veterinary Medicine; University of California; Davis CA 95616 USA
4. Veterinary Housecalls; Arcata CA 95521 USA