1 Department of Gastroenterology, St. Josef-Hospital, Ruhr-University Bochum, Bochum D-44791, Germany. Electronic address: oscar.cahyadi@rub.de.
2 Institute of Digestive and Liver Care, SL Raheja Hospital, Mumbai, India.
3 Hepato-Pancreato-Biliary Unit, Freeman Hospital, Newcastle upon Tyne, UK; Newcastle University Population Health Sciences Institute, Newcastle upon Tyne, UK.
4 Department of Gastroenterology, Dr Balmis General University Hospital and Department of Clinical Medicine, Miguel Herna´ndez University, Alicante, Spain; Alicante Institute for Health and Biomedical Research (ISABIAL), Alicante, Spain.
5 Department of Gastroenterology, University Hospital Southampton NHS Foundation Trust, Southampton, UK.