[1] Hosp Univ Puerta Hierro Majadahonda, Majadahonda, Madrid, Spain
[2] Fdn Espanola Reumatol, Madrid, Spain
[3] Univ Hosp Parc Tauli, Sabadell, Spain
[4] Inst Invest Sanitaria Biobizkaia, Gastroenterol Dept, Hosp Univ Galdakao Usansolo, Bizkaia, Spain
[5] Hosp Univ Canarias, Rheumatol Dept, San Cristobal la Laguna, Tenerife, Spain
[6] Hosp Univ Gregorio Maranon, Gastroenterol Dept, Madrid, Spain
[7] Hosp Clin Univ Santiago de Compostela, Rheumatol Dept, Inst Invest Sanitaria Santiago de Compostela, Santiago De Compostela, Spain
[8] Hosp Clin Univ Santiago de Compostela, Gastroenterol Dept, Santiago De Compostela, Spain
[9] Hosp Univ Canarias, Canarias, Spain
[10] Hosp Univ Canarias, Gastroenterol Dept, San Cristobal la Laguna, Spain
[11] Basurto Hosp, Bilbao, Spain
[12] Hosp Univ Basurto, Gastroenterol Dept, Bilbao, Spain
[13] Univ Cordoba, IMIBIC Reina Sofia Hosp, Cordoba, Spain
[14] Hosp Reina Sofia, Gastroenterol Dept, Cordoba, Spain
[15] Hosp Univ Puerta Hierro Majadahonda, Serv Gastroenterol, IDIPHISA, Madrid, Spain
[16] UAB, Parc Tauli Hosp Univ I3PT, Dept Med, Rheumatol, Sabadell, Spain
[17] Univ Autonoma Barcelona, Gastroenterol Dept, Parc Tauli, Univ Hosp,Inst Invest & Innovacio Parc Tauli, Sabadell, Spain
[18] Hosp Gen Univ Dr Balmis Alicante, Gastroenterol Dept, ISABIAL & CIBERehd, Alicante, Spain
[19] Hosp Univ Puerta Hierro Majadahonda, Majadahonda, Spain