1. Large Animal Surgery; Department of Large Animal Clinical Science; Faculty of Health and Clinical Sciences; University of Copenhagen; Taastrup Denmark
2. Ophthalmology Service; Department of Small and Large Animal Clnincal Sciences; College of Veterinary Medicine; University of Florida; Florida USA
3. Ophthalmology; Department of Veterinary Clinical Sciences; College of Veterinary Medicine; Iowa State University; Iowa USA
4. Population Biology; Department of Large Animal Clinical Sciences; Faculty of Health and Clinical Sciences; University of Copenhagen; Frederiksberg Denmark