1. Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
2. Present address: ATIP‐Avenir Group, INSERM U699, Faculté de Médecine Xavier Bichat, Université Paris 7, Paris, France
3. Present address: University of Veterinary Medicine Vienna, Institute of Animal Breeding and Genetics, Vienna, Austria
4. Department of Pediatric Surgery, Hannover Medical School, Hannover, Germany
5. Department of Gastroenterology and Hepatology, Hannover Medical School, Hannover, Germany
6. Present address: Klinikum Region Hannover Robert Koch, Gehrden, Germany
7. INSERM U773, Centre de Recherche Biomédicale Bichat‐Beaujon (CRB3), Université Paris 7‐Denis Diderot, Paris, France