Affiliation: | 1. Research Unit, Foundation Hospital of Jove, , Gijón, Spain;2. Department of Internal Medicine, Foundation Hospital of Jove, , Gijón, Spain;3. Department of Gastroenterology, Central University Hospital of Asturias, , Oviedo, Spain;4. Department of Pathology, Foundation Hospital of Jove, , Gijón, Spain;5. Department of Pathology, Central University Hospital of Asturias, , Oviedo, Spain;6. Department of General Surgery, Foundation Hospital of Jove, , Gijón, Spain |