1. Department of Veterinary Science, University of Pisa, San Piero a Grado, Italy
2. RTI International, Washington, DC, USA
3. Candioli Pharma S.r.l, Beinasco, Italy
4. Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
5. Department of Veterinary Medicine and Animal Production, University of Napoli Federico II, Naples, Italy
6. Veterinary Practitioner, Turin, Italy
7. Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, UK