[1] Univ Saarland, Med Ctr, Dept Med 2, Homburg, Germany
[2] Univ Basque Country UPV EHU, Donostia Univ Hosp HUD, Biodonostia Res Inst, Dept Liver & Gastrointestinal Dis, San Sebastian, Spain
[3] Osatek SA, San Sebastian, Spain
[4] Biodonostia Res Inst HUD, CIBER ESP, CASPe, Clin Epidemiol Unit, San Sebastian, Spain