1. Research Unit of Epidemiology and Risk Analysis applied to veterinary science (UREAR-ULg); Department of Infectious and Parasitic diseases; Faculty of Veterinary Medicine; University of Liege; Liege Belgium
2. Equine Clinic; Faculty of Veterinary Medicine; University of Liege; Liege Belgium
3. UR 346 Animal Epidemiology INRA Theix, Vetagrosup, Equine Department; University of Lyon; Lyon France
4. Réseau d'Epidémio-Surveillance en Pathologie Equine; Mondeville France
5. Veterinary Clinic of Faulquemont; Faulquemont France
6. CODA - CERVA; Veterinary and Agrochemical Research Centre; Brussels Belgium