1. Centre for Liver and Digestive DisordersThe Royal Infirmary of EdinburghEdinburghUK
2. Department of GastroenterologyComplejo Hospitalario de NavarraPamplonaSpain
3. Gastroenterology and Liver UnitRoyal Hallamshire HospitalSheffieldUK
4. South Tyneside NHS Foundation TrustSouth ShieldsUK