1. Liver Failure Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, United Kingdom
2. Division of Hepatology, Department of Medicine II, Leipzig University Medical Center, Leipzig, Germany
3. Division of Hepatology and Gastroenterology, Department of Medical, Campus Virchow-Klinikum, Charité - Universitätsmedizin Berlin, Berlin, Germany
4. Service d'Hépatologie et de Soins Intensifs Digestifs, Hôpital Jean Minjoz, 25000 Besançon, France