[1] Hosp Gen Univ Dr Balmis Alicante, Gastroenterol CIBERehd Inst Invest Sanitaria & Bi, Alicante, Spain
[2] Hosp Galdakao, Gastroenterol, Bilbao, Spain
[3] Hosp Gregorio Maranon, Gastroenterol, Madrid, Spain
[4] Unidad Invest Soc Espanola Reumatol, Res, Madrid, Spain
[5] Hosp Univ Parc Tauli Sabadell, Rheumatol, Sabadell, Spain
[6] Hosp Univ Canarias, Rheumatol, San Cristobal la Laguna, Spain
[7] Complejo Hosp Santiago De Compostela, Rheumatol, Santiago De Compostela, Spain
[8] Complejo Hosp Santiago De Compostela, Gastroenterol, Santiago De Compostela, Spain
[9] Hosp Univ Canarias, Gastroenterol, San Cristobal la Laguna, Spain
[10] Hosp Basurto, Rheumatol, Basurto, Spain
[11] Hosp Basurto, Gastroenterol, Basurto, Spain
[12] Hosp Univ Reina Sofia, Rheumatol, Cordoba, Spain
[13] Hosp Univ Reina Sofia, Gastroenterol, Cordoba, Spain
[14] Hosp Univ Puerta De Hierro, Rheumatol, Madrid, Spain
[15] Hosp Univ Puerta De Hierro, Gastroenterol, Madrid, Spain
[16] Hosp Parc Tauli, Rheumatol, Sabadell, Spain
[17] Hosp Parc Tauli UAB, Clin Biochem, Sabadell, Spain
[18] Hosp Cabuenes, Rheumatol, Gijon, Spain
[19] Hosp Cabuenes, Gastroenterol, Gijon, Spain
[20] Hosp Reg Malaga, Rheumatol, Malaga, Spain
[21] Hosp Reg Malaga, Gastroenterol, Malaga, Spain
[22] Hosp Galdakao, Rheumatol, Madrid, Spain
[23] Hosp Galdakao, Gastroenterol, Galdakao, Spain
[24] Hosp Univ Son Llatzer, Rheumatol, Mallorca, Spain
[25] Hosp Univ Son Llatzer, Gastroenterol, Mallorca, Spain
[26] Complejo Hosp Univ A Coruna, Rheumatol, La Coruna, Spain
[27] Complejo Hosp Univ A Coruna, Gastroenterol, La Coruna, Spain
[28] Hosp Gregorio Maranon, Rheumatol, Madrid, Spain
[29] Hosp Univ Gen Santa Lucia, Rheumatol, Cartagena, Spain
[30] Hosp Univ Gen Santa Lucia, Gastroenterol, Cartagena, Spain
[31] Hospital Infantil Mexico, Bioestadist, Mexico City, DF, Mexico