1. Ophthalmology Section, Equine Department, Vetsuisse Faculty University of Zurich Zurich Switzerland
2. Department of Small Animal Clinical Sciences, College of Veterinary Medicine Michigan State University East Lansing Michigan USA
3. Department of Ophthalmology and Visual Sciences, School of Medicine and Public Health University of Wisconsin‐Madison Madison Wisconsin USA
4. Section of Epidemiology, Vetsuisse Faculty University of Zurich Zurich Switzerland