1 Institute of Liver Studies & Transplantation, King's College Hospital Foundation NHS Trust, London, United Kingdom.
2 University of Virginia, Division of Gastroenterology and Hepatology, Charlottesville, VA, United States.
3 Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands. Electronic address: j.a.lisman@umcg.nl.