1. Internal Medicine Department, VCA Arboretum View Animal Hospital, 2551 Warrenville Road; Downers Grove Illinois
2. Department of Small Animal Clinical Sciences, Gastrointestinal Laboratory; College of Veterinary Medicine and Biomedical Sciences, Texas A&M University; Texas
3. Department of Small Animal Medicine, Small Animal Clinic, College of Veterinary Medicine, University of Leipzig; Leipzig Saxony Germany
4. Department of Animal Medicine and Surgery, College of Veterinary Medicine, Complutense University of Madrid; Madrid Spain
5. Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University; Ames Iowa