Affiliation: | (1) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain;(2) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain;(3) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain;(4) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain;(5) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain;(6) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain;(7) Gastroenterology and Hepatology Unit, University Hospital "Marqués de Valdecilla", Santander, Spain |