1. Department of Clinical Veterinary Medicine, Clinic of Small Animal Internal Medicine; Ludwig Maximilian University of Munich; Munich Germany
2. Department of Small Animal Clinical Sciences, Gastrointestinal Laboratory; Texas A&M University; College Station Texas
3. IDEXX Laboratories, Inc.; West Sacramento California
4. Department of Pathobiology; University of Guelph; Guelph Ontario Canada
5. Department of Clinical Veterinary Medicine, Clinic of Small Animal Medicine; Justus-Liebig-University Giessen; Giessen Germany