1. Department of Gastroenterology and Hepatology, Amsterdam Gastroenterology Endocrinology Metabolism Research Institute, Amsterdam University Medical Centre, Vrije Universiteit Amsterdam , Amsterdam , the Netherlands
2. Departments of Gastroenterology & Clinical Pharmacology, Christchurch Hospital, Canterbury District Health Board and University of Otago, Christchurch , New Zealand
3. Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centre, Vrije Universiteit Amsterdam , Amsterdam , the Netherlands
4. Inflammatory Bowel Diseases Group, Mater Research Institute, University of Queensland, Translational Research Institute, Woolloongabba , Queensland , Australia