[1] Hosp del Mar, Serv Epidemiol & Evaluac, Barcelona, Spain
[2] IMIM Inst Hosp Mar Invest Med, Barcelona, Spain
[3] Red Invest Serv Salud Enfermedades Cron REDISSEC, Barcelona, Spain
[4] Univ Barcelona, Hosp Clin, Serv Med Prevent & Epidemiol, Barcelona, Spain
[5] Hosp del Mar, Serv Digestol, Barcelona, Spain
[6] Hosp Clin Barcelona, CDB, Serv Bioquim & Genet Mol, Barcelona, Spain
[7] Consell Coll Farmaceut Catalunya, Direccio Projectes & Recerca, Barcelona, Spain
[8] Coll Oficial Farmaceut Barcelona, Barcelona, Spain
[9] Univ Barcelona, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Inst Invest Biomed August Pi & Sunyer IDIBAPS, Serv Gastroenterol,Hosp Clin, Barcelona, Spain