[1] Hosp Garcia Orcoyen, Unidad Aparato Digest, Navarra, Spain
[2] Complejo Hosp Navarra, Serv Aparato Digest, Pamplona, Spain
[3] Inst Invest Sanitaria Navarra idiSNA, Pamplona, Spain
[4] Hosp Mar, Inst Hosp Mar Invest Med IMIM, Barcelona, Spain
[5] Hosp Gen Univ Alicante, Unidad Gastroenterol, Alicante, Spain
[6] Hosp Univ Mutua Terrassa, Unidad Enfermedad Inflamatoria Intestinal, Barcelona, Spain
[7] Ctr Invest Biomed Red Enfermedades Hepdt & Digest, Barcelona, Spain