Affiliation: | 1. Service of Digestive Diseases, University Hospital Lozano Blesa, c/Domingo Miral s/n, 50009, Zaragoza, Spain 2. Aragon Health Sciences Institute, (IIS Aragón), Zaragoza, Spain 3. CIBERehd, Barcelona, Spain 4. University of Zaragoza, Zaragoza, Spain
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