1. School of Veterinary Science, Massey University, Palmerston North, New Zealand
2. Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, Uppsala, Sweden
3. Department of Medicine, Swiss Tropical and Public Health Institute and University of Basel, Basel, Switzerland
4. Departamento de Ciencias Veterinarias y Salud Pública, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile
5. Instituto de Medicina Preventiva Veterinaria, Universidad Austral de Chile, Valdivia, Chile