1. School of Biosciences and Veterinary MedicineUniversity of Camerino Via Circonvallazione 93/95, Matelica 62024 Italy
2. Gastrointestinal Laboratory, Department of Small Animal Clinical SciencesTexas A&M University College Station Texas USA
3. The Royal (Dick) School of Veterinary Studies and The Roslin Institute, Hospital for Small AnimalsThe University of Edinburgh, Easter Bush Campus Midlothian EH25 9RG UK
4. Department of Veterinary Clinical SciencesCollege of Veterinary Medicine, Iowa State University Ames IA 50011 USA
5. Department of Animal Medicine and SurgeryFaculty of Veterinary Medicine, Complutense University of Madrid Avda. Puerta de Hierro s/n, Madrid 28040 Spain
6. Veterinary Clinic and Laboratory San Marco Via dell'Industria 3, Veggiano 35030 Italy
7. Faculty of Veterinary MedicineClinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich Munich Germany
8. Department for Small Animals and HorsesVetMedUni Vienna Veterinaerplatz 1, Vienna 1210 Austria
9. St. Antonio Veterinary Clinic S.S. 415 Paullese 6, Madignano 26020 Italy