1. Sheila Sherlock Liver Centre; Royal Free Hospital and the UCL Institute of Liver and Digestive Health; London UK
2. Division of Surgery and Interventional Science; University College London; London UK
3. School of Life and Medical Sciences; University of Hertfordshire; Hatfield UK
4. Department of General Surgery; Homerton University Hospital NHS Foundation Trust; London UK
5. Department of Health Sciences; University of Leicester; Leicester UK
6. UCL Medical School; London UK
7. Centre for Trust, Peace and Social Relations; Coventry University; Coventry UK
8. Cochrane Hepato-Biliary Group, Copenhagen Trial Unit, Centre for Clinical Intervention Research; The Capital Region of Denmark, Rigshospitalet, Copenhagen University Hospital; Copenhagen Denmark
9. Department of Therapy; I.M. Sechenov First Moscow State Medical University; Moscow Russian Federation