1. University College London; London UK
2. University College London; Division of Surgery and Interventional Science; London UK NW3 2PF
3. University of Leicester; Department of Health Sciences; University Road Leicester UK LE1 7RH
4. University College London Hospitals NHS Foundation Trust; Clinical Microbiology and Virology; 5th Floor Central 250 Euston Road London UK NW1 2PG
5. 'Sechenov' First Moscow State Medical University; Center for Evidence-Based Medicine; Pogodinskja st. 1\1 Moscow Russian Federation 119881
6. Coventry University; Centre for Trust, Peace and Social Relations; Coventry UK
7. University of Glasgow; HEHTA; University Ave Glasgow G12 8QQ Glasgow UK
8. PSC Support; PO Box 6945 London UK
9. Royal Free Hospital and the UCL Institute of Liver and Digestive Health; Sheila Sherlock Liver Centre; Pond Street London UK NW3 2QG