1. Institute of International Health, Charité Universitätsmedizin Berlin, Berlin, Germany
2. Department of Radiology, Charité Universitätsmedizin Berlin, Berlin, Germany
3. Department of Infectious Diseases, Charité Universitätsmedizin Berlin, Berlin, Germany
4. Department of Gastroenterology and Hepatology, Charité Universitätsmedizin Berlin, Berlin, Germany