1. Clinic for Small Animal Surgery and Reproduction; Veterinary Faculty; Ludwig Maximilians University Munich; Veterinärstr. 13 Munich Germany
2. Royal Veterinary College; University of London; Hawkshead Lane North Mymms Herfordshire AL9 7TA UK
3. Institute of Veterinary Anatomy, Histology and Embryology; Veterinary Faculty; Ludwig Maximilians University Munich; Veterinärstr. 13 Munich Germany
4. Chair of Animal Genetics and Husbandry; Veterinary Faculty; Ludwig Maximilians University Munich; Veterinärstr. 13 Munich Germany
5. Dortmunder Kreis - Association for Diagnosis of Inherited Eye Diseases in Animals (DOK); Hoher Wall 20 44137 Dortmund Germany