1. VISAVET Health Surveillance Centre, Universidad Complutense de Madrid, Madrid, Spain
2. Veterinary Population Medicine Department, University of Minnesota, St Paul, Minnesota, USA
3. Facultad de Veterinaria, Universidad de la República, Montevideo, Uruguay
4. Biostatistics Program, Oregon State University, Corvallis, Oregon, USA
5. Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Madrid, Spain