[1] Hosp Clin Barcelona, Liver Unit,Inst Invest Biomed August Pi & Sunyer, Hepat Hemodynam Lab, Inst Malalties Digest & Metab, E-08036 Barcelona, Spain
[2] Ciberehd, Madrid, Spain
[3] Hosp Santa Creu & Sant Pau, Dept Gastroenterol, Barcelona, Spain
[4] Univ Alcala, Hosp Univ Ramon & Cajal, Dept Gastroenterol, Madrid, Spain
[5] Hosp Gen Univ Gregorio Maranon, Dept Gastroenterol, Madrid, Spain
[6] Hosp Badalona Germans Trias & Pujol, Dept Gastroenterol, Badalona, Spain