1. University; of Lyon; Lyon F-69003 France
2. Swiss Institute of Equine Medicine, University of Berne and ALP-Haras; Länggasstrasse 124 Berne CH-3001 Switzerland
3. Equine Department; VetAgro Sup, Veterinary Campus of Lyon; 1 Avenue Bourgelat Marcy l'Etoile F-69280 France