1. Department of Gastroenterology Sandwell and West Birmingham NHS Trust West Midlands West Bromwich UK
2. Department of Gastroenterology Guys and St Thomas' NHS Trust London UK
3. Department of Gastroenterology The Royal Wolverhampton NHS Trust Wolverhampton UK
4. Department of Gastroenterology Croydon Healthcare NHS Trust London UK
5. Research Institute in Healthcare Sciences, University of Wolverhampton Wolverhampton UK
6. Department of Medicine University of Melbourne Melbourne Australia
7. Department of Gastroenterology Northern Hospital Epping Melbourne Australia