1. University College London; Division of Surgery and Interventional Science; Rowland Hill Street London UK NW32PF
2. University of Leicester; Department of Health Sciences; University Road Leicester UK LE1 7RH
3. Ng Teng Fong General Hospital National University Health System; Department of Medicine; 1 Jurong East Street 21 Singapore Singapore 609606
4. University of Glasgow; HEHTA; University Ave Glasgow G12 8QQ Glasgow UK
5. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
6. 'Sechenov' First Moscow State Medical University; Center for Evidence-Based Medicine; Pogodinskja st. 1\1 Moscow Russian Federation 119881
7. Royal Free Hospital and the UCL Institute of Liver and Digestive Health; Sheila Sherlock Liver Centre; Pond Street London UK NW3 2QG
8. PSC Support; PO Box 6945 London UK
9. Coventry University; Centre for Trust, Peace and Social Relations; Coventry UK