1. Gastroenterology Department Hospital Universitario de Galdakao Biocruces Bizkaia Health Research Institute Galdakao Spain
2. School of Medicine University of Deusto Bilbao Spain
3. Gastroenterology Department Levanger Hospital Nord‐Trøndelag Hospital Trust Trondheim Norway
4. Department of Molecular Medicine Centre of Molecular Inflammation Research (CEMIR) Norwegian University of Science and Technology (NTNU) Trondheim Norway
5. Gastroenterology Department Hospital Clínico Universitario de Santiago Santiago de Compostela Spain