[1] Univ Seville, Virgen del Rocio Univ Hosp, Interctr Unit Digest Dis, Seville 41018, Spain
[2] Univ Seville, Virgen del Rocio Univ Hosp, CIBERehd, Seville 41018, Spain
[3] Inst Biomed Sevilla, Seville 41018, Spain
[4] Univ Penn, Dept Med, Div Gastroenterol & Hepatol, Philadelphia, PA 19107 USA