1. Department of Gastroenterology and Hepatology, and Department of Medical Microbiology and Infection Control, VU University Medical Center, 1181 HZ, Amsterdam, The Netherlands
2. Department of Medical Microbiology, Center for Infectious Diseases, Leiden University Medical Center, 2333 ZA, Leiden, The Netherlands
3. Department of Gastroenterology and Hepatology and Centralized Biobanking Facility, Leiden University Medical Center, 2333 ZA, Leiden, The Netherlands
4. Department of Gastroenterology and Hepatology, Haaglanden Medical Center, 2597 AX, The Hague, The Netherlands;