[1] Ctr Hosp Vila Nova De Gaia Espinho, Dept Gastroenterol, Vila Nova De Gaia, Portugal
[2] Univ Porto, Dept Biomed, Unit Pharmacol & Therapeut, Fac Med, Porto, Portugal
[3] Ctr Hlth Technol & Serv Res CINTESIS, Biomed, Porto, Portugal
[4] Ctr Hosp Tondela Viseu, Dept Gastroenterol, Viseu, Portugal
[5] Hosp Santo Antonio, Porto Hosp Ctr, Dept Gastroenterol, Porto, Portugal
[6] Lisbon North Hosp, Dept Gastroenterol, Ctr Santa Maria Hosp, Lisbon, Portugal
[7] Hosp Braga, Dept Gastroenterol, Braga, Portugal
[8] Ctr Hosp Lisboa Cent, Santo Antonio Capuchos Hosp, Dept Gastroenterol, Lisbon, Portugal
[9] Univ Hosp Ctr Coimbra, Dept Gastroenterol, Coimbra, Portugal
[10] Univ Porto, Dept Community Med, Fac Med, Informat & Hlth Decis Sci, Porto, Portugal
[11] Agaples Markus Hosp, Dept Med 1, Gastroenterol, Frankfurt, Germany
[12] Humanitas Clin & Res Ctr IRCCS, Inflammatory Bowel Dis IBD Ctr, Dept Gastroenterol, Milan, Italy
[13] Univ Lorraine, Univ Hosp Nancy, Dept Gastroenterol, Vandoeuvre Les Nancy, France
[14] INSERM, U1256, NGERE, Vandoeuvre Les Nancy, France
[15] Sao Joao Univ Hosp Ctr CHUSJ, Dept Gastroenterol, Porto, Portugal