title: Open-access upper GI endoscopy in the 21st century.
authors.forename: Mattijs E
authors.initials: ME
authors.lastname: Numans
mesh_terms: D016099:Endoscopy, Gastrointestinal / Q000639:trends*; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D041742:Upper Gastrointestinal Tract