[1] Kings Coll London, Sch Immunol & Microbial Sci, Fac Life Sci & Med, Liver Sci, London, England
[2] Hosp Prof Doutor Fernando Fonseca, Gastroenterol & Hepatol, Amadora, Portugal
[3] Univ Lisbon, Ctr Estat & Aplicacoes, Lisbon, Portugal
[4] Kings Coll Hosp London, Liver Intens Therapy Unit, London, England