[1] Univ Barcelona, Hosp Clin IDIBAPS, Dept Pulm Med, Barcelona, Spain
[2] Biomed Res Networking Ctr Resp Dis CIBERES, Madrid, Spain
[3] Biomed Res Networking Ctr Resp Dis CIBERES, Barcelona, Spain
[4] Univ Barcelona, Hosp Clin IDIBAPS, Hepatol Serv, Barcelona, Spain
[5] Biomed Res Networking Ctr Hepat & Digest Dis CIBE, Madrid, Spain
[6] Biomed Res Networking Ctr Hepat & Digest Dis CIBE, Barcelona, Spain
[7] Hosp Santa Creu & Sant Pau, Digest Syst Serv, Barcelona, Spain