1. Clinic of Small Animal Internal Medicine, Centre for Clinical Veterinary Medicine Ludwig‐Maximilians‐University Munich Germany
2. Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences Texas A&M University College Station Texas USA
3. Department of Veterinary Sciences Institute of Infectious Diseases and Zoonoses, Faculty of Veterinary Medicine, Ludwig‐Maximilians‐University Munich Germany
4. Clinic of Small Animal Medicine Ismaning Ismaning Germany