1. German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
2. Division of Infectious Diseases and Tropical Medicine, Medical Center of the University of Munich (LMU), Munich, Germany
3. Klinikum München Schwabing, Munich, Germany
4. Klinik für Gastroenterologie, Hepatologie und Infektiologie, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
5. University Medical Center Hamburg-Eppendorf, 1st Medical Department, Division of Tropical Medicine and Infectious Diseases, Hamburg, Germany
6. Institut für Tropenmedizin, Reisemedizin und Humanparasitologie des Universitätsklinikums Tübingen, Tübingen, Germany
7. Robert Koch-Institute, Department of Infectious Disease Epidemiology, Unit of Gastrointestinal Infections, Zoonoses and Tropical Infections, Berlin, Germany