1. Department of Anatomy, Physiology and Biochemistry; Swedish University of Agricultural Sciences; Uppsala Sweden
2. Department of Clinical Sciences; Swedish University of Agricultural Sciences; Uppsala Sweden
3. Department of Equine Sciences; Faculty of Veterinary Medicine; Utrecht University; Utrecht The Netherlands
4. Department of Clinical Science and Services; The Royal Veterinary College; University of London; North Mymms, Hatfield Hertfordshire UK
5. Department, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
6. Department of Veterinary Clinical Sciences; Faculty of Health and Medical Sciences; University of Copenhagen; Taastrup Denmark