title: Aging and gastrointestinal immunity.
authors.forename: B J
authors.initials: BJ
authors.lastname: Freda
mesh_terms: D000375:Aging / Q000276:immunology*; D004396:Coloring Agents; D004064:Digestive System / Q000276:immunology*; D006801:Humans; D008751:Methylene Blue; D010581:Peyer's Patches / Q000276:immunology; D013194:Staining and Labeling / Q000379:methods
chemical_list: D004396:Coloring Agents; D008751:Methylene Blue