1. Department of Clinical Sciences Comparative Ophthalmology College of Veterinary Medicine and Biomedical Sciences Colorado State University Fort Collins CO USA
2. Department of Veterinary and Animal Sciences, Animal Welfare and Diseases Control University of Copenhagen Frederiksberg C Denmark
3. Department of Veterinary Clinical Sciences Comparative Ophthalmology College of Veterinary Medicine The Ohio State University Columbus OH USA
4. Department of Veterinary Clinical Sciences Comparative Ophthalmology College of Veterinary Medicine Iowa State University Ames IA USA
5. Department of Veterinary Clinical Sciences, Emergency and Critical Care College of Veterinary Medicine University of Minnesota Saint Paul MN USA