1. Central Laboratory Animal Facility, Justus Liebig University, Giessen, Germany
2. Department of Gastroenterology, Justus Liebig University, Giessen, Germany
3. Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty, Heinrich-Heine-University, Duesseldorf, Germany
4. Institute of Veterinary Pathology, Justus-Liebig-University, Giessen, Germany
5. Department of Pathology, Justus-Liebig-University, Giessen, Germany