1. From the School of Agriculture and Veterinary Sciences, Department of Veterinary Sciences (Rodrigues, Viegas) and Institute for Biotechnology and Bioengineering, Centre of Genomics and Biotechnology (Rodrigues, Bastos), University of Trás-os-Montes e Alto Douro, PO Box 1013, 5001-801 Vila Real, Portugal; the Association for Study and Protection of Asinine Livestock – AEPGA (Mora), Largo da Igreja, 5225-011 Atenor, Portugal; Department of Surgery and Animal Medicine (Rodrigues, Ascaso), Avd. Puerta de...