1. Royal Free Hospital and the UCL Institute of Liver and Digestive Health; Sheila Sherlock Liver Centre; Pond Street Hampstead London UK NW3 2QG
2. University of Messina; Department of Clinical and Experimental Medicine, Division of Clinical and Molecular Hepatology; Via Consolare Valeria, 1 Messina Messina Italy 98125
3. Royal Free Campus, UCL Medical School; Department of Surgery; Royal Free Hospital Rowland Hill Street London UK NW3 2PF
4. London School of Hygiene and Tropical Medicine; HSRP; Keppel Street London UK WC1E 7HT
5. West Sussex County Council; Public Health & Social Research Unit; The Grange, County Hall Campus Tower Street Chichester West Sussex UK PO19 1QT