Gastroenterology and Endoscopy Unit;
Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico;
Department of Pathophysiology and Transplantation;
Università degli Studi di Milano;
Neuroendocrine; tumors; Atrophic; gastritis; Octreotide; Lanreotide; Enterochromaffin-like; cells; Carcinoid; tumors;