1. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; The Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
2. I.M. Sechenov First Moscow State Medical University; Clinic of Internal Diseases Propedeutics; Pogodinskaja 1 Moscow Russian Federation 119991
3. Università degli Studi di Milano; Dipartimento di Scienze Biomediche e Cliniche "L. Sacco"; via GB Grassi 74 Milan Italy 20157
4. I.M. Sechenov First Moscow State Medical University; Moscow Russian Federation 119881
5. Royal Free Hospital and the UCL Institute of Liver and Digestive Health; Sheila Sherlock Liver Centre; Pond Street London UK NW3 2QG