[1] Kings Coll Hosp London, Inst Liver Studies, Liver Intens Therapy Unit, London SE5 8RX, England
[2] Kings Coll London, Dept Primary Care & Publ Hlth Sci, London WC2R 2LS, England
[3] Kings Coll Hosp London, Inst Liver Studies, London SE5 8RX, England
[4] Fdn Liver Res, Inst Hepatol, London, England