1. Equine Clinic of Grosbois; Boissy St Leger France
2. Hanseklinikfür Pferde; Sittensen Germany
3. Department of Surgery and Anaesthesiology of Domestic Animals, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
4. Université Paris-Est, Ecole Vétérinaire d'Alfort; Departement Anatomie; Maisons-Alfort France
5. De Lingehoeve Diergeneeskunde; Lienden The Netherlands
6. Dierenkliniek De Bosdreef; Moerbeke-Waas Belgium
7. Department of Veterinary Clinical Sciences; Royal Veterinary College; North Mymms United Kingdom
8. Department of Clinical Sciences, College of Veterinary Medicine; Cornell University; Ithaca New York