1. Institute of Hygiene University of Münster Münster Germany
2. Institute of Molecular Infection Biology University of Würzburg Würzburg Germany
3. National Reference Center for Salmonella and Other Bacterial Enteric Pathogens Robert Koch Institute Wernigerode Germany
4. NInstitute of Infectiology Center for Molecular Biology of Inflammation (ZMBE) University of Münster Münster Germany
5. Department of Pediatrics Washington University School of Medicine Saint Louis MO USA