title: [Introduction].
authors.affiliation: Service d'Hépato-gastro entérologie, Groupe hospitalier Cochin 27 rue du Fg Saint-Jacques F-75679 Paris Cedex 14, France.
authors.forename: D
authors.initials: D
authors.lastname: Couturier
mesh_terms: D004066:Digestive System Diseases / Q000175:diagnosis*; D005243:Feces / Q000737:chemistry*; D006801:Humans