1. Cochrane Hepato-Biliary Group; Blegdamsvej 9, 7811 Copenhagen Denmark 2100
2. Azienda Socio-Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda; S.C. Epatologia e Gastroenterologia; Piazza Ospedale Maggiore, 3 Milan Italy 20162
3. UCL Institute for Liver and Digestive Health, UCL Medical School, Royal Free Hospital; Liver Failure Group; London UK
4. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
5. Medical Faculty, University of Nis; Department of Internal Medicine; Zorana Djindjica 81 Nis Serbia 18000