1. School of Veterinary Medicine; William R. Pritchard Veterinary Medical Teaching Hospital; University of California-Davis; 1 Garrod Drive Davis CA 95695 USA
2. Department of Medicine and Epidemiology; School of Veterinary Medicine; University of California-Davis; One Shields Avenue Davis CA 95616 USA
3. Department of Surgical and Radiological Sciences; School of Veterinary Medicine; University of Wisconsin-Madison; 2015 Linden Drive Madison WI 53706 USA
4. Department of Pathobiological Sciences; School of Veterinary Medicine; University of Wisconsin-Madison; 2015 Linden Drive Madison WI 53706 USA
5. Department of Clinical Sciences; New York State College of Veterinary Medicine; Cornell University; 602 Tower Road Ithaca NY 14853 USA
6. Wildlife Investigations Laboratory; California Department of Fish and Wildlife; 1701 Nimbus Road Suite D Rancho Cordova CA 95670 USA
7. Nevada Department of Wildlife; 6980 Sierra Center Pkwy Suite 120 Reno NV 89511 USA
8. Department of Surgical and Radiological Sciences; School of Veterinary Medicine; University of California-Davis; One Shields Avenue Davis CA 95616 USA
9. Department of Ophthalmology & Vision Science; School of Medicine; University of California-Davis; One Shields Avenue Davis CA 95616 USA