1. Institute of Tropical Medicine University of Tübingen Tübingen Germany
2. Vietnamese‐German Center for Medical Research VG‐CARE Hanoi Vietnam
3. Medical Faculty Duy Tan University Da Nang Vietnam
4. German Federal Institute for Risk Assessment Berlin Germany
5. Department of Gastroenterology, Hepatology and Endocrinology Hannover Medical School Hannover Germany
6. German Center for Infection Research Partner Hannover Braunschweig Germany
7. Division of Viral Gastroenteritis and Hepatitis Pathogens and Enteroviruses Department of Infectious Diseases Robert Koch Institute Berlin Germany
8. Institute of Tropical Medicine Universitätsklinikum Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné (CERMEL) Gabon