1. University College LondonInstitute for Liver & Digestive HealthDivision of MedicineLondonUnited Kingdom
2. Department of Gastroenterology and HepatologyUniversity Hospital ZurichSt ClaraspitalBaselSwitzerland
3. Department of Gastroenterology and HepatologyRijnstate HospitalArnhemThe Netherlands
4. Clinic of GastroenterologyTsaritsa Yoanna University HospitalMedical University of SofiaSofiaBulgaria
5. Department of SurgeryKlinikum rechts der IsarTechnical University of MunichMunichGermany
6. Department of GastroenterologyHospital de GaldakaoGaldakaoSpain
7. Department of BiochemistryMedical University of LodzLodzPoland
8. Riga Stradins UniversityRiga East Clinical University HospitalRigaLatvia