1. Center for Experimental and Molecular Medicine, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
2. Cancer Center Amsterdam, 1081 HV Amsterdam, The Netherlands
3. Department of Internal Medicine, CWZ, 6532 SZ Nijmegen, The Netherlands
4. Department of Gastroenterology and Hepatology, Antwerp University Hospital, 2650 Edegem, Belgium
5. Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, 2000 Antwerpen, Belgium