1. Royal Free Campus, UCL Medical School; Department of Surgery; Royal Free Hospital Rowland Hill Street London UK NW3 2PF
2. Royal Free Hospital and the UCL Institute of Liver and Digestive Health; Sheila Sherlock Liver Centre; Pond Street London UK NW3 2QG
3. University of Hertfordshire; Biological & Environmental Sciences; College Lane Hatfield Hertfordshire UK AL10 9AB