keywords CD8(+) T-CELLS CELIAC-DISEASE CESAREAN-SECTION COMMENSAL MICROBIOTA DENDRITIC CELLS GUT-BRAIN AXIS Gastroenterology & Hepatology INFLAMMATORY-BOWEL-DISEASE INTESTINAL MICROBIOTA INTRAEPITHELIAL LYMPHOCYTES Life Sciences & Biomedicine MESENTERIC LYMPH-NODES Microbiology Neurosciences Neurosciences & Neurology Nutrition & Dietetics Science & Technology