1. From Neurology Unit (V.M.), Centre Hospitalier Vétérinaire des Cordeliers, Meaux, Il de France, France.
2. From Internal Medicine Unit (C.S.), Centre Hospitalier Vétérinaire des Cordeliers, Meaux, Il de France, France.
3. From Neurology Unit, Centre Hospitalier Vétérinaire Pommery, Reims, France (A.J.).