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.