title: Preface.
authors.affiliation: Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands. Electronic address: gerard.dijkstra@umcg.nl.
authors.forename: Gerard
authors.initials: G
authors.lastname: Dijkstra
authors.affiliation: Department of Pediatrics, Erasmus University and Erasmus Medical Center, Rotterdam, The Netherlands; Department of Pediatrics, University of Leiden and Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Edmond
authors.initials: E
authors.lastname: Rings
mesh_terms: D001327:Autoimmune Diseases / Q000276:immunology / Q000503:physiopathology*; D004734:Energy Metabolism / Q000502:physiology; D006801:Humans; D007408:Intestinal Absorption / Q000276:immunology / Q000502:physiology*; D007410:Intestinal Diseases / Q000276:immunology / Q000503:physiopathology*; D008659:Metabolic Diseases / Q000276:immunology / Q000503:physiopathology*