1. Comparative Ophthalmology Service; Department of Veterinary Clinical Sciences; College of Veterinary Medicine; University of Minnesota; 1352 Boyd Avenue Saint Paul MN 55108 USA
2. The Veterinary Medical Center of Long Island; 75 Sunrise Highway West Islip NY 11795 USA
3. Department of Veterinary Clinical Sciences; Comparative Ophthalmology; The Ohio State University; 1900 Coffey Road Columbus OH 43210 USA
4. Department of Radiological and Surgical Sciences; University of California-Davis; Davis CA 95616 USA
5. Northwest Animal Eye Specialists; 13020 NE 85th Street Kirkland WA 98033 USA
6. Department of Infectious Disease and Global Health; Cummings School of Veterinary Medicine; Tufts University; 200 Westboro Road North Grafton MA 01536 USA
7. Comparative Ocular Pathology Laboratory of Wisconsin; University of Wisconsin; 2015 Linden Dr. #3308 Madison WI 53706 USA