1. Liver Failure Group; Institute for Liver and Digestive Health; University College London; London UK
2. Department of Hepatology and Gastroenterology; Aarhus University Hospital; Aarhus Denmark
3. Department of Clinical Epidemiology; Aarhus University Hospital; Aarhus Denmark
4. St Mark's Hospital; London UK
5. Infectious Diseases Unit; Sanofi-Aventis R&D; Marcy l'Etoile France