[1] Hosp Univ GermansTrias Pujol, Servicio Reumatologia, Badalona, Barcelona, Spain
[2] Hosp Univ Trias Pujol Badalona, Servicio Gastroenterologia, Barcelona, Spain
[3] Hosp Univ Trias Pujol, Servicio Aparato Digestivo, Badalona, Spain
[4] Ctr Investigac Biomed Red deEnfermedades Hepat, Madrid, Spain